Sahih Muslim | Book 15 | Hadith Number 4102

Narrated by Ibn 'Umar
Ibn 'Umar reported Allah's Messenger (may peace be upon him) as saying: He who gives up his share in a slave, and has enough money to pay the full price of the slave, then full emancipation devolves upon him; but if he has not the money, then he emancipated what he emancipated.