مُسْنَدُ أَحْمَدَ
Musnad Ahmad 3667
Musnad of Abdullah bin Mas'ood
It was narrated that 'Abdullah (رضي الله عنه) said: Prisoners would be brought to the Messenger of Allah (ﷺ) and he would give an entire family (to someone as slave), because he did not want to separate them.
Musnad Ahmad 3690Hasan because of corroborating evidence, this is a da’eef is