Musannaf Ibn Abi Shaybah 12737 — A man repeating oaths about one thing

Ibrahim said: When a man says to another man who owes him money, "If you do not repay me on such-and-such a day, then it is charity upon you," it is nothing. And if he says, "If you do not give it to me by such-and-such a day, then it is charity for the poor," then it is as he said.