Abu al-Zanad أبو الزناد · Commercial Transactions (Kitab Al-Buyu)

"He (the Prophet) purchased a calf from a caravan, but he had no money with him. He then sold it with some profit and gave the profit in charity to the poor and widows of Banu 'Abd al-Muttalib. He then said: I shall not buy anything after this but only when I have money with me.

The Prophet (ﷺ) forbade the sale of grapes till they became black and the sale of grain till it had become hard.

The Prophet (ﷺ) forbade sale of fruits for a number of years. One of the two narrators (Abu al-Zubair and Sa'id b. Mina') mentioned the words "sale for years" (bai' al-sinin instead of al-mu'awamah).