A man who bargains with another man over something

Abdullah bin Yasar said: I heard Sayyiduna Abu al-Darda' (may Allah be pleased with him) haggling over a price with another man. The man swore that he would not sell that thing. Later he gave it to Abu al-Darda' at that same price. Abu al-Darda' said: "I fear (or: I dislike) that I should lead you into sin."

It is narrated from Sayyiduna Mu'adh (may Allah be pleased with him) that he haggled with a man over goods, and the man swore that he would not sell. Then the man called him to sell it to him, and he disliked buying it from him.

Something similar is reported from Sayyiduna Mu'adh (may Allah be pleased with him).

Ibn Awn said: I said to Muhammad: "A man swore not to sell something, and then he sells it. May I buy it from him?" He said: "Yes, buy it, and remind him of his oath."

Something similar is reported from Ibn Sirin. He said: "This is a safeguard for his oath."