Sunan an-Nasa'i
Sunan an-Nasa'i 4184
Arabic hadith text
أَخْبَرَنَا قُتَيْبَةُ، قَالَ حَدَّثَنَا اللَّيْثُ، عَنْ أَبِي الزُّبَيْرِ، عَنْ جَابِرٍ، قَالَ جَاءَ عَبْدٌ فَبَايَعَ النَّبِيَّ صلى الله عليه وسلم عَلَى الْهِجْرَةِ وَلاَ يَشْعُرُ النَّبِيُّ صلى الله عليه وسلم أَنَّهُ عَبْدٌ فَجَاءَ سَيِّدُهُ يُرِيدُهُ فَقَالَ النَّبِيُّ صلى الله عليه وسلم " بِعْنِيهِ " . فَاشْتَرَاهُ بِعَبْدَيْنِ أَسْوَدَيْنِ ثُمَّ لَمْ يُبَايِعْ أَحَدًا حَتَّى يَسْأَلَهُ أَعَبْدٌ هُوَ
Translation
Jabir said: A slave came and pledged to the Prophet to migrate, although the Prophet did not know he was enslaved. His master came looking for him. The Prophet said: Sell him to me. He bought him for two black slaves. After that, he did not accept a pledge from anyone until asking whether he was a slave.