Musannaf Ibn Abi Shayba 13:1870

Abu Bakr narrated to us, he said: Shababa narrated to us, from Ibn Abi Dhi'b, from Yazid ibn Abdullah ibn Fudayl, from Rafi' ibn Khadij, Jabir ibn Abdullah, and Abu Sa'id al-Khudri, they said: Whoever has a slave who has a contract of manumission (mukātab) and a slave-woman whom he visits, he does not have the right to take anything from what he gave her.