Musannaf Ibn Abi Shayba 9:1457

Ibn Idris narrated to us, from Muhammad ibn ‘Amr, from Yazid ibn ‘Abd Allah ibn Qusayt, who said: I asked Abu Salamah ibn ‘Abd al-Rahman, Sa‘id ibn al-Musayyib, ‘Ata’, and Sulayman ibn Yasar regarding breastfeeding from men. They said: It does not make anything prohibited.