Isa bin Yonus bin Abi Ishaq عيسى بن يونس بن أبي إسحاق · The Chapters on Business Transactions

"The Messenger of Allah (ﷺ) forbade Gharar transaction sand Hasah transactions. "

the Messenger of Allah (ﷺ) went to the market of Nabit, and looked at it, and said: "This is not a market for you." Then we went to another market and looked at it, and said: "This is not a market for you." Then he came back to this market and walked around in it then he said: "This is your market. It will always be your market and no duty will be levied on it." (Do,if)

"O Allah, bless my nation in their early mornings (i.e., what they do early in the morning)." (Hasan)He said: "When he sent out a raiding party or an army, he would send them at the beginning of the day." He said: (1) "Sakhr was a man engaged in trade, and he used to send his goods out at the beginning of the day, and his wealth grew and increased."

"The Messenger of Allah (ﷺ) said: 'Whoever buys a Muhaffalah, (1) he has the choice (of annulling the deal) for three days. If he returns it, then he must also give wheat equal to twice, the amount of its milk, or equal to the amount of its milk."'