Musannaf Ibn Abi Shayba 35:278

Ibn ‘Ulayyah narrated to us, from Sa‘id ibn Abi ‘Arubah, from Qatadah, from al-Hasan, from ‘Uqbah ibn ‘Amir, who said: The Prophet, may Allah bless him and grant him peace, said: "The warranty period for a slave is three days."