Musannaf Ibn Abi Shayba 27:760

Ali ibn Mushir narrated to us, from Zakariya, from al-Sha'bi, who said: Abdullah ibn Muti' ibn al-Aswad informed me, from his father, who said: I heard the Messenger of Allah (may Allah bless him and grant him peace) on the day of the conquest of Mecca saying: "No Qurayshi shall be killed in captivity after this day until the Day of Resurrection."