Musannaf Ibn Abi Shayba 13:2067

Abu Bakr narrated to us, he said: Waki’ narrated to us, he said: Isma’il bin Abi Khalid narrated to us, he said: A woman came to al-Sha’bi and said: "My daughter was sold on the condition that she not be sold." He said: "Your daughter is upon her condition."