Sunan Ibn Majah, Volume 3, Book 19, Hadith 2517 (DarusSalam) ⓘ
Jabir bin `Abdullah was heard to say: “We used to sell our slave women and the mothers of our children (Umahat Awaldina) when the Prophet was still living among us, and we did not see anything wrong with that.”
حَدَّثَنَا مُحَمَّدُ بْنُ يَحْيَى، وَإِسْحَاقُ بْنُ مَنْصُورٍ، قَالاَ حَدَّثَنَا عَبْدُ الرَّزَّاقِ، عَنِ ابْنِ جُرَيْجٍ، أَخْبَرَنِي أَبُو الزُّبَيْرِ، أَنَّهُ سَمِعَ جَابِرَ بْنَ عَبْدِ اللَّهِ، يَقُولُ كُنَّا نَبِيعُ سَرَارِينَا وَأُمَّهَاتِ أَوْلاَدِنَا وَالنَّبِيُّ صلى الله عليه وسلم فِينَا حَىٌّ لاَ نَرَى بِذَلِكَ بَأْسًا .
also referenced under: Hadith 2517 (Reference) & Book 19, Hadith 2613 (In-Book)