Yazid bin Zari' يزيد بن زريع · The Chapters on Business Transactions

"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."'

"I heard the Messenger of Allah (ﷺ) saying: 'Whoever goes to the Morning prayer first thing in the morning, he goes out with the banner of faith but whoever goes out to the marketplace first thing in the morning, he goes out under the banner of Iblis (Satan).' "