Musannaf Ibn Abi Shaybah 24942 — A man who buys on credit

Ibn Awn said: It was mentioned to Nafi' (may Allah have mercy on him) that Sayyiduna Ibn Umar (may Allah be pleased with them both) used to buy on terms of payment when he became well-off (that is, when money came he would pay the amount). Nafi' became angry and said: He would only buy from people whom he knew and who knew him, and he would put off paying them for a year or two, while he had properties which, had he wished, he could have sold and paid them. And when Sayyiduna Ibn Umar (may Allah be pleased with them both) became well-off, he paid.