Musannaf Ibn Abi Shaybah 22615 — A man who buys goods or a slave

It is narrated from Hajjaj that a man bought skins of ghee and paid the money in cash. Then some of the skins turned out to be short, so he intended to make up the shortfall with some dirhams. Sayyiduna Ibn Umar (may Allah be pleased with them both) said: If you are to make the sale, complete it in full; otherwise leave it in full.