Musannaf Ibn Abi Shayba 13:2320

Abu Bakr narrated to us, he said: Waki’ narrated to us, he said: Sabi’ ibn ‘Amr narrated to us, he said: I asked Salim ibn ‘Abdullah about a man who pays in advance to a man for food, then he comes to the city and takes it, and says [to the seller]: "Buy it from me." He said: "Whoever wishes to deceive himself [may do so]; let him take possession of it, then sell it if he wishes."