Abu Karayb, Muhammad bin al-'Ala' محمد بن العلاء - أبو كريب · The Chapters on Business Transactions

'Whoever achieves at something, let him stick with It.'"

a man from among the Ansar came to the Prophet (ﷺ) and begged from him. He said, "Do you have anything in your house?" He said: "Yes, a blanket, part of which we cover ourselves with and part we spread beneath us, and a bowl from which we drink water." He said: "Givethem to me." So he brought them to him, and the Messenger of Allah (ﷺ) took them in his hand and said, "Who will by these two things?"…

"Makhrafah Al' Abdi and I brought linens from Hajar The Messenger of Allah (ﷺ) came to us to bargain with us with some trousers. There was someone with me who weighed (the goods) in exchange for a wage. So the Prophet (ﷺ) said to the one weighing: 'Weigh and add more.'"

"There is nothing wrong with selling animals, one for two, hand to hand," but he disliked selling them on credit.

"My master used to give me food and I would feed others from it, then he stopped me," or he said: "He beat me. So I asked the Prophet,” -or- "he asked him and I said: 'I will not stop.' He said: 'Both of you will be rewarded."'