I heard the Prophet ﷺ saying, "Whoever claims to be the son of a person other than his father, and he knows that person is not his father, then Paradise will be forbidden for him." I mentioned that to Abu Bakra, and he said, "My ears heard that and my heart memorized it from Messenger of Allah ﷺ.  

سَمِعْتُ النَّبِيَّ ﷺ يَقُولُ مَنِ ادَّعَى إِلَى غَيْرِ أَبِيهِ وَهْوَ يَعْلَمُ أَنَّهُ غَيْرُ أَبِيهِ فَالْجَنَّةُ عَلَيْهِ حَرَامٌ فَذَكَرْتُهُ لأَبِي بَكْرَةَ فَقَالَ وَأَنَا سَمِعَتْهُ أُذُنَاىَ وَوَعَاهُ قَلْبِي مِنْ رَسُولِ اللَّهِ ﷺ  

The Prophet ﷺ said, "Do not deny your fathers (i.e. claim to be the sons of persons other than your fathers), and whoever denies his father, is charged with disbelief."  

عَنِ النَّبِيِّ ﷺ قَالَ لاَ تَرْغَبُوا عَنْ آبَائِكُمْ فَمَنْ رَغِبَ عَنْ أَبِيهِ فَهُوَ كُفْرٌ  

We have nothing except the Book of Allah and this written paper from the Prophet (wherein is written:) Medina is a sanctuary from the 'Air Mountain to such and such a place, and whoever innovates in it an heresy or commits a sin, or gives shelter to such an innovator in it will incur the curse of Allah, the angels, and all the people, none of his compulsory or optional good deeds of worship will be accepted. And the asylum (of protection) granted by any Muslim is to be secured (respected) by all the other Muslims; and whoever betrays a Muslim in this respect incurs the curse of Allah, the angels, and all the people, and none of his compulsory or optional good deeds of worship will be accepted, and whoever (freed slave) befriends (take as masters) other than his manumitters without their permission incurs the curse of Allah, the angels, and all the people, and none of his compulsory or optional good deeds of worship will be accepted.  

مَا عِنْدَنَا شَىْءٌ إِلاَّ كِتَابُ اللَّهِ وَهَذِهِ الصَّحِيفَةُ عَنِ النَّبِيِّ ﷺ الْمَدِينَةُ حَرَمٌ مَا بَيْنَ عَائِرٍ إِلَى كَذَا مَنْ أَحْدَثَ فِيهَا حَدَثًا أَوْ آوَى مُحْدِثًا فَعَلَيْهِ لَعْنَةُ اللَّهِ وَالْمَلاَئِكَةِ وَالنَّاسِ أَجْمَعِينَ لاَ يُقْبَلُ مِنْهُ صَرْفٌ وَلاَ عَدْلٌ وَقَالَ ذِمَّةُ الْمُسْلِمِينَ وَاحِدَةٌ فَمَنْ أَخْفَرَ مُسْلِمًا فَعَلَيْهِ لَعْنَةُ اللَّهِ وَالْمَلاَئِكَةِ وَالنَّاسِ أَجْمَعِينَ لاَ يُقْبَلُ مِنْهُ صَرْفٌ وَلاَ عَدْلٌ وَمَنْ تَوَلَّى قَوْمًا بِغَيْرِ إِذْنِ مَوَالِيهِ فَعَلَيْهِ لَعْنَةُ اللَّهِ وَالْمَلاَئِكَةِ وَالنَّاسِ أَجْمَعِينَ لاَ يُقْبَلُ مِنْهُ صَرْفٌ وَلاَ عَدْلٌ  

We did not, write anything from the Prophet ﷺ except the Qur'an and what is written in this paper, (wherein) the Prophet ﷺ said, "Medina is a sanctuary from (the mountain of) Air to so and-so, therefore, whoever innovates (in it) an heresy or commits a sin, or gives shelter to such an innovator, will incur the Curse of Allah. the angels and all the people; and none of his compulsory or optional good deeds of worship will be accepted And the asylum granted by any Muslim Is to be secured by all the Muslims even if it is granted by one of the lowest social status among them. And whoever betrays a Muslim in this respect will incur the Curse of Allah, the angels and all the people, and his compulsory and optional good deeds of worship will not be accepted. And any freed slave will take as masters (befriends) people other than his own real masters who freed him without taking the permission of the latter, will incur the Curse of Allah, the angels and all the people, and his compulsory and optional good deeds of worship will not be accepted."  

عَنِ النَّبِيِّ ﷺ إِلاَّ الْقُرْآنَ وَمَا فِي هَذِهِ الصَّحِيفَةِ قَالَ النَّبِيُّ ﷺ الْمَدِينَةُ حَرَامٌ مَا بَيْنَ عَائِرٍ إِلَى كَذَا فَمَنْ أَحْدَثَ حَدَثًا أَوْ آوَى مُحْدِثًا فَعَلَيْهِ لَعْنَةُ اللَّهِ وَالْمَلاَئِكَةِ وَالنَّاسِ أَجْمَعِينَ لاَ يُقْبَلُ مِنْهُ عَدْلٌ وَلاَ صَرْفٌ وَذِمَّةُ الْمُسْلِمِينَ وَاحِدَةٌ يَسْعَى بِهَا أَدْنَاهُمْ فَمَنْ أَخْفَرَ مُسْلِمًا فَعَلَيْهِ لَعْنَةُ اللَّهِ وَالْمَلاَئِكَةِ وَالنَّاسِ أَجْمَعِينَ لاَ يُقْبَلُ مِنْهُ صَرْفٌ وَلاَ عَدْلٌ وَمَنْ وَالَى قَوْمًا بِغَيْرِ إِذْنِ مَوَالِيهِ فَعَلَيْهِ لَعْنَةُ اللَّهِ وَالْمَلاَئِكَةِ وَالنَّاسِ أَجْمَعِينَ لاَ يُقْبَلُ مِنْهُ صَرْفٌ وَلاَ عَدْلٌ  

We have no Book to recite except the Book of Allah (Qur'an) and this paper. Then ʿAli took out the paper, and behold ! There was written in it, legal verdicts about the retaliation for wounds, the ages of the camels (to be paid as Zakat or as blood money). In it was also written: 'Medina is a sanctuary from Air (mountain) to Thaur (mountain). So whoever innovates in it an heresy (something new in religion) or commits a crime in it or gives shelter to such an innovator, will incur the curse of Allah, the angels and all the people, and none of his compulsory or optional good deeds will be accepted on the Day of Resurrection. And whoever (a freed slave) takes as his master (i.e. be-friends) some people other than hi real masters without the permission of his real masters, will incur the curse of Allah, the angels and all the people, and none of his compulsory, or optional good deeds will be accepted on the Day of Resurrection. And the asylum granted by any Muslim is to be secured by all the Muslims, even if it is granted by one of the lowest social status among them; and whoever betrays a Muslim, in this respect will incur the curse of Allah, the angels, and all the people, and none of his Compulsory or optional good deeds will be accepted on the Day of Resurrection."  

عَلِيٌّ ؓ مَا عِنْدَنَا كِتَابٌ نَقْرَؤُهُ إِلاَّ كِتَابُ اللَّهِ غَيْرَ هَذِهِ الصَّحِيفَةِ قَالَ فَأَخْرَجَهَا فَإِذَا فِيهَا أَشْيَاءُ مِنَ الْجِرَاحَاتِ وَأَسْنَانِ الإِبِلِ قَالَ وَفِيهَا الْمَدِينَةُ حَرَمٌ مَا بَيْنَ عَيْرٍ إِلَى ثَوْرٍ فَمَنْ أَحْدَثَ فِيهَا حَدَثًا أَوْ آوَى مُحْدِثًا فَعَلَيْهِ لَعْنَةُ اللَّهِ وَالْمَلاَئِكَةِ وَالنَّاسِ أَجْمَعِينَ لاَ يُقْبَلُ مِنْهُ يَوْمَ الْقِيَامَةِ صَرْفٌ وَلاَ عَدْلٌ وَمَنْ وَالَى قَوْمًا بِغَيْرِ إِذْنِ مَوَالِيهِ فَعَلَيْهِ لَعْنَةُ اللَّهِ وَالْمَلاَئِكَةِ وَالنَّاسِ أَجْمَعِينَ لاَ يُقْبَلُ مِنْهُ يَوْمَ الْقِيَامَةِ صَرْفٌ وَلاَ عَدْلٌ وَذِمَّةُ الْمُسْلِمِينَ وَاحِدَةٌ يَسْعَى بِهَا أَدْنَاهُمْ فَمَنْ أَخْفَرَ مُسْلِمًا فَعَلَيْهِ لَعْنَةُ اللَّهِ وَالْمَلاَئِكَةِ وَالنَّاسِ أَجْمَعِينَ لاَ يُقْبَلُ مِنْهُ يَوْمَ الْقِيَامَةِ صَرْفٌ وَلاَ عَدْلٌ  

ʿAli addressed us while he was standing on a brick pulpit and carrying a sword from which was hanging a scroll He said "By Allah, we have no book to read except Allah's Book and whatever is on this scroll," And then he unrolled it, and behold, in it was written what sort of camels were to be given as blood money, and there was also written in it: 'Medina is a sanctuary form 'Air (mountain) to such and such place so whoever innovates in it an heresy or commits a sin therein, he will incur the curse of Allah, the angels, and all the people and Allah will not accept his compulsory or optional good deeds.' There was also written in it: 'The asylum (pledge of protection) granted by any Muslims is one and the same, (even a Muslim of the lowest status is to be secured and respected by all the other Muslims, and whoever betrays a Muslim in this respect (by violating the pledge) will incur the curse of Allah, the angels, and all the people, and Allah will not accept his compulsory or optional good deeds.' There was also written in it: 'Whoever (freed slave) befriends (takes as masters) other than his real masters (manumitters) without their permission will incur the curse of Allah, the angels, and all the people, and Allah will not accept his compulsory or optional good deeds. ' (See Hadith No. 94, Vol. 3)  

خَطَبَنَا عَلِيٌّ ؓ عَلَى مِنْبَرٍ مِنْ آجُرٍّ وَعَلَيْهِ سَيْفٌ فِيهِ صَحِيفَةٌ مُعَلَّقَةٌ فَقَالَ وَاللَّهِ مَا عِنْدَنَا مِنْ كِتَابٍ يُقْرَأُ إِلاَّ كِتَابُ اللَّهِ وَمَا فِي هَذِهِ الصَّحِيفَةِ فَنَشَرَهَا فَإِذَا فِيهَا أَسْنَانُ الإِبِلِ وَإِذَا فِيهَا الْمَدِينَةُ حَرَمٌ مِنْ عَيْرٍ إِلَى كَذَا فَمَنْ أَحْدَثَ فِيهَا حَدَثًا فَعَلَيْهِ لَعْنَةُ اللَّهِ وَالْمَلاَئِكَةِ وَالنَّاسِ أَجْمَعِينَ لاَ يَقْبَلُ اللَّهُ مِنْهُ صَرْفًا وَلاَ عَدْلاً وَإِذَا فِيهِ ذِمَّةُ الْمُسْلِمِينَ وَاحِدَةٌ يَسْعَى بِهَا أَدْنَاهُمْ فَمَنْ أَخْفَرَ مُسْلِمًا فَعَلَيْهِ لَعْنَةُ اللَّهِ وَالْمَلاَئِكَةِ وَالنَّاسِ أَجْمَعِينَ لاَ يَقْبَلُ اللَّهُ مِنْهُ صَرْفًا وَلاَ عَدْلاً وَإِذَا فِيهَا مَنْ وَالَى قَوْمًا بِغَيْرِ إِذْنِ مَوَالِيهِ فَعَلَيْهِ لَعْنَةُ اللَّهِ وَالْمَلاَئِكَةِ وَالنَّاسِ أَجْمَعِينَ لاَ يَقْبَلُ اللَّهُ مِنْهُ صَرْفًا وَلاَ عَدْلاً  

heard the Messenger of Allah ﷺ say, "No person who claimed someone else as his father other than ˹his own˺ knowingly has committed nothing but kufr (infidelity). He who made a claim of a thing that does not belong to him is not from us and he should prepare his abode in Hellfire."

"And he who labeled anyone with kufr (disbelief) or called him an enemy of Allah while he is not, then it gets ˹thrown˺ back on him."  

أَنَّهُ سَمِعَ رَسُولَ اللَّهِ ﷺ يَقُولُ: «لَيْسَ مِنْ رَجُلٍ ادَّعَى لِغَيْرِ أَبِيهِ وَهُوَ يَعْلَمُهُ إِلاَّ كَفَرَ؛ وَمَنِ ادَّعَى مَا لَيْسَ لَهُ فَلَيْسَ مِنَّا وَلْيَتَبَوَّأْ مَقْعَدَهُ مِنَ النَّارِ؛»

«وَمَنْ دَعَا رَجُلاً بِالْكُفْرِ أَوْ قَالَ عَدُوَّ اللَّهِ وَلَيْسَ كَذَلِكَ إِلاَّ حَارَ عَلَيْهِ۔»