Harb ibn Ubaydullah told on the authority of his grandfather, his mother's father, that he had it on the authority of his father that the Messenger of Allah ﷺ said: Tithes are to be levied on Jews and Christians, but not on Muslims.  

قَالَ رَسُولُ اللَّهِ ﷺ إِنَّمَا الْعُشُورُ عَلَى الْيَهُودِ وَالنَّصَارَى وَلَيْسَ عَلَى الْمُسْلِمِينَ عُشُورٌ  

The tradition mentioned above has also been transmitted by Harb bin ‘Ubaid Allah from the Prophet ﷺ to the same effect through a different chain of narrators. This version has the word kharaj(land tax) instead of ‘ushr (tithes).  

عَنِ النَّبِيِّ ﷺ بِمَعْنَاهُ قَالَ خَرَاجٌ مَكَانَ الْعُشُورُ  

A man reported from Bakr bin Wa’il on the authority of his maternal uncle as saying, I said “Apostle of Allaah ﷺ may I levy tithe on my people.?” He replied “Tithes are to be levied on Jews and Christians.”  

قُلْتُ يَا رَسُولَ اللَّهِ أُعَشِّرُ قَوْمِي قَالَ إِنَّمَا الْعُشُورُ عَلَى الْيَهُودِ وَالنَّصَارَى  

Harb ibn Ubaydullah ibn Umayr ath-Thaqafi told on the authority of his grandfather, a man of Banu Taghlib: I came to the Prophet ﷺ, embraced Islam, and he taught me Islam. He also taught me how I should take sadaqah from my people who had become Muslim. I then returned to him and said: Messenger of Allah, I remembered whatever you taught me except the sadaqah. Should I levy tithe on them? He replied: No, tithes are to be levied on Christians and Jews.  

أَتَيْتُ النَّبِيَّ ﷺ فَأَسْلَمْتُ وَعَلَّمَنِي الإِسْلاَمَ وَعَلَّمَنِي كَيْفَ آخُذُ الصَّدَقَةَ مِنْ قَوْمِي مِمَّنْ أَسْلَمَ ثُمَّ رَجَعْتُ إِلَيْهِ فَقُلْتُ يَا رَسُولَ اللَّهِ كُلُّ مَا عَلَّمْتَنِي قَدْ حَفِظْتُهُ إِلاَّ الصَّدَقَةَ أَفَأُعَشِّرُهُمْ قَالَ لاَ إِنَّمَا الْعُشُورُ عَلَى النَّصَارَى وَالْيَهُودِ  

We alighted with the Prophet ﷺ at Khaybar, and he had his companions with him. The chief of Khaybar was a defiant and abominable man. He came to the Prophet ﷺ and said: Is it proper for you, Muhammad, that you slaughter our donkeys, eat our fruit, and beat our women? The Prophet ﷺ became angry and said: Ibn Awf, ride your horse, and call loudly: Beware, Paradise is lawful only for a believer, and that they (the people) should gather for prayer. They gathered and the Prophet ﷺ led them in prayer, stood up and said: Does any of you, while reclining on his couch, imagine that Allah has prohibited only that which is to be found in this Qur'an? By Allah, I have preached, commanded and prohibited various matters as numerous as that which is found in the Qur'an, or more numerous. Allah has not permitted you to enter the houses of the people of the Book without permission, or beat their women, or eat their fruits when they give you that which is imposed on them.  

نَزَلْنَا مَعَ النَّبِيِّ ﷺ خَيْبَرَ وَمَعَهُ مَنْ مَعَهُ مِنْ أَصْحَابِهِ وَكَانَ صَاحِبُ خَيْبَرَ رَجُلاً مَارِدًا مُنْكَرًا فَأَقْبَلَ إِلَى النَّبِيِّ ﷺ فَقَالَ يَا مُحَمَّدُ أَلَكُمْ أَنْ تَذْبَحُوا حُمُرَنَا وَتَأْكُلُوا ثَمَرَنَا وَتَضْرِبُوا نِسَاءَنَا فَغَضِبَ يَعْنِي النَّبِيَّ ﷺ وَقَالَ يَا ابْنَ عَوْفٍ ارْكَبْ فَرَسَكَ ثُمَّ نَادِ أَلاَ إِنَّ الْجَنَّةَ لاَ تَحِلُّ إِلاَّ لِمُؤْمِنٍ وَأَنِ اجْتَمِعُوا لِلصَّلاَةِ قَالَ فَاجْتَمَعُوا ثُمَّ صَلَّى بِهِمُ النَّبِيُّ ﷺ ثُمَّ قَامَ فَقَالَ أَيَحْسَبُ أَحَدُكُمْ مُتَّكِئًا عَلَى أَرِيكَتِهِ قَدْ يَظُنُّ أَنَّ اللَّهَ لَمْ يُحَرِّمْ شَيْئًا إِلاَّ مَا فِي هَذَا الْقُرْآنِ أَلاَ وَإِنِّي وَاللَّهِ قَدْ وَعَظْتُ وَأَمَرْتُ وَنَهَيْتُ عَنْ أَشْيَاءَ إِنَّهَا لَمِثْلُ الْقُرْآنِ أَوْ أَكْثَرُ وَأَنَّ اللَّهَ ﷻ لَمْ يُحِلَّ لَكُمْ أَنْ تَدْخُلُوا بُيُوتَ أَهْلِ الْكِتَابِ إِلاَّ بِإِذْنٍ وَلاَ ضَرْبَ نِسَائِهِمْ وَلاَ أَكْلَ ثِمَارِهِمْ إِذَا أَعْطَوْكُمُ الَّذِي عَلَيْهِمْ  

The Prophet ﷺ said: Probably you will fight with a people, you will dominate them, and they will save themselves and their children by their property. The version of Sa'id has You will then conclude peace with them. The agreed version goes: Then do no take anything from them more than that, for it is not proper for you.  

قَالَ رَسُولُ اللَّهِ ﷺ لَعَلَّكُمْ تُقَاتِلُونَ قَوْمًا فَتَظْهَرُونَ عَلَيْهِمْ فَيَتَّقُونَكُمْ بِأَمْوَالِهِمْ دُونَ أَنْفُسِهِمْ وَأَبْنَائِهِمْ قَالَ سَعِيدٌ فِي حَدِيثِهِ فَيُصَالِحُونَكُمْ عَلَى صُلْحٍ ثُمَّ اتَّفَقَا فَلاَ تُصِيبُوا مِنْهُمْ شَيْئًا فَوْقَ ذَلِكَ فَإِنَّهُ لاَ يَصْلُحُ لَكُمْ  

Safwan reported from a number of Companions of the Messenger of Allah ﷺ on the authority of their fathers who were relatives of each other. The Messenger of Allah ﷺ said: Beware, if anyone wrongs a contracting man, or diminishes his right, or forces him to work beyond his capacity, or takes from him anything without his consent, I shall plead for him on the Day of Judgment.  

أَخْبَرَهُ عَنْ عِدَّةٍ مِنْ أَبْنَاءِ أَصْحَابِ رَسُولِ اللَّهِ ﷺ عَنْ آبَائِهِمْ دِنْيَةً عَنْ رَسُولِ اللَّهِ ﷺ قَالَ أَلاَ مَنْ ظَلَمَ مُعَاهِدًا أَوِ انْتَقَصَهُ أَوْ كَلَّفَهُ فَوْقَ طَاقَتِهِ أَوْ أَخَذَ مِنْهُ شَيْئًا بِغَيْرِ طِيبِ نَفْسٍ فَأَنَا حَجِيجُهُ يَوْمَ الْقِيَامَةِ