Ibn Sirin محمد بن سيرين الأنصاري · The Chapters on Business Transactions

"When you weigh, allow more. "

"The Messenger of Allah (ﷺ) said: 'Whoever buys food, let him not sell it until he has taken full possession of it.'" (Sahih) In his narration, (one of the narrators) Abu 'Awanah said: "Ibn 'Abbas said: 'I think everything is like food."'

the Messenger of Allah (ﷺ) forbade selling animals for animals on credit.