Musannaf Ibn Abi Shayba 13:1769

Abu Bakr narrated to us, he said: Ibn Numayr narrated to us, from Ubayd Allah, from Nafi’, from Ibn Umar, who said: The Prophet, peace and blessings of Allah be upon him, said: "Whoever emancipates a share he owns in a slave, he is responsible for his partners [for the value of their shares] from his wealth, if he has wealth." And Ibn Umar said: "If he does not have wealth, the slave works [to pay off the remaining value]."