[Machine] From the Prophet ﷺ that he said: "None of you should outbid his brother upon his bid. If it is certain and I am not certain about it, then it is similar to one who does not propose to his brother's betrothed and does not outbid his bid when the seller is satisfied and allows the sale to take place before the final sale. Even if he sells, he must abide by this. The Messenger of Allah ﷺ bought from someone who added and sold to someone who added to his brother's bid. However, the seller was not satisfied with the first bid until he sought an increase. Abu Abdullah al-Hafiz informed us, Abu al-Abbas informed us, Rabi' informed us, and al-Shafi'i mentioned it. The sheikh said: The hadith of outbidding has been proven from multiple angles."  

عَنِ النَّبِيِّ ﷺ أَنَّهُ قَالَ لَا يَسُومُ أَحَدُكُمْ عَلَى سَوْمِ أَخِيهِ فَإِنْ كَانَ ثَابِتًا وَلَسْتُ أَحْفَظُهُ ثَابِتًا فَهُوَ مِثْلَ لَا يَخْطُبُ أَحَدُكُمْ عَلَى خِطْبَةِ أَخِيهِ وَلَا يَسُومُ عَلَى سَوْمِهِ إِذَا رَضِيَ الْبَائِعُ وَأَذِنَ بِأَنْ يُبَاعَ قَبْلَ الْبَيْعِ حَتَّى لَوْ بِيعَ لَزِمَهُ قَالَ وَرَسُولُ اللهِ ﷺ بَاعَ فِيمَنْ يَزِيدُ وَبَيْعُ مَنْ يَزِيدُ سَوْمُ رَجُلٍ عَلَى سَوْمِ أَخِيهِ وَلَكِنَّ الْبَائِعَ لَمْ يَرْضَ السَّوْمَ الْأَوَّلَ حَتَّى طَلَبَ الزِّيَادَةَ أَخْبَرَنَا أَبُو عَبْدِ اللهِ الْحَافِظُ أنا أَبُو الْعَبَّاسِ أنا الرَّبِيعُ أنا الشَّافِعِيُّ فَذَكَرَهُ قَالَ الشَّيْخُ حَدِيثُ السَّوْمِ قَدْ ثَبَتَ مِنْ أَوْجُهٍ  

[Machine] The Messenger of Allah ﷺ forbade a person from outbidding his brother and mentioned other terms that have been previously mentioned in the chapter of trade.  

أَنَّ رَسُولَ اللهِ ﷺ نَهَى أَنْ يَسْتَامَ الرَّجُلُ عَلَى سَوْمِ أَخِيهِ وَذَكَرَ سَائِرَ الْأَلْفَاظِ الَّتِي قَدْ مَضَتْ فِي بَابِ التَّصْرِيَةِ  

[Machine] Narrated by the Prophet ﷺ that he forbade a person from outbidding his brother in a purchase and from proposing marriage to a woman who has already been proposed to by his brother.  

عَنِ النَّبِيِّ ﷺ أَنَّهُ نَهَى أَنْ يَسْتَامَ الرَّجُلُ عَلَى سَوْمِ أَخِيهِ وَأَنْ يَخْطُبَ عَلَى خِطْبَةِ أَخِيهِ  

[Machine] The Messenger of Allah, may ﷺ , said, "A Muslim should not attribute his fasting to the fasting of another Muslim." Abu Abdullah al-Hafiz narrated to us, Abu Ahmad al-Hafiz informed me, I am Muhammad ibn Ishaq, Abu Bakr narrated to us, Ali ibn Hujr narrated to us, Ismail ibn Jafar mentioned it.  

أَنَّ رَسُولَ اللهِ ﷺ قَالَ لَا يَسُمِ الْمُسْلِمُ عَلَى سَوْمِ الْمُسْلِمِ أَخْبَرَنَاهُ أَبُو عَبْدِ اللهِ الْحَافِظُ أَخْبَرَنِي أَبُو أَحْمَدَ الْحَافِظُ أنا مُحَمَّدُ بْنُ إِسْحَاقَ أَبُو بَكْرٍ ثنا عَلِيُّ بْنُ حُجْرٍ ثنا إِسْمَاعِيلُ بْنُ جَعْفَرٍ فَذَكَرَهُ  

A man must not make proposal of marriage to a woman when his brother has done so already. And he must not offer a price for a thing for which his brother had already offered a price; and a woman must not be combined in marriage with her father's sister, nor with her mother's sister, and a woman must not ask to have her sister divorced in order to deprive her of what belongs to her, but she must marry, because she will have what Allah has decreed for her. (Using translation from Muslim 1408g)   

قَالَ رَسُولُ اللهِ ﷺ لَا يَخْطُبُ الرَّجُلُ عَلَى خِطْبَةِ أَخِيهِ وَلَا يَسُومُ عَلَى سَوْمِ أَخِيهِ وَلَا تُنْكَحُ الْمَرْأَةُ عَلَى عَمَّتِهَا وَلَا عَلَى خَالَتِهَا وَلَا تَسْأَلُ الْمَرْأَةُ طَلَاقَ أُخْتِهَا؛ لِتُكْفِئَ مَا فِي صَحْفَتِهَا وَلِتُنْكَحَ إِنَّمَا لَهَا مَا كَتَبَ اللهُ لَهَا  

[Machine] The Messenger of Allah ﷺ said, "One of you should not fast on his brother's fast, nor should he propose to the one who has already been proposed to, and this is the wording."  

قَالَ رَسُولُ اللهِ ﷺ لَا يَسُومَنَّ أَحَدُكُمْ عَلَى سَوْمِ أَخِيهِ وَلَا يَخْطُبْ عَلَى خِطْبَتِهِ وَبِهَذَا اللَّفْظِ  

A believer is the brother of a believer, so it is not lawful for a believer to outbid his brother, and he should not propose an engagement when his brother has thus proposed until he gives it up. (Using translation from Muslim 1414)   

أَنَّهُ سَمِعَ عُقْبَةَ بْنَ عَامِرٍ عَلَى الْمِنْبَرِ يَقُولُ إِنَّ رَسُولَ اللهِ ﷺ قَالَ الْمُؤْمِنُ أَخُو الْمُؤْمِنِ وَلَا يَحِلُّ لِمُؤْمِنٍ أَنْ يَبْتَاعَ عَلَى بَيْعِ أَخِيهِ حَتَّى يَذَرَ وَلَا يَخْطُبَ عَلَى خِطْبَةِ أَخِيهِ حَتَّى يَذَرَ