Alqama bin Qays علقمة بن قيس بن عبد الله · The Chapters on Business Transactions

"The Messenger of Allah (ﷺ) bought a load of fodder from a Bedouin man. When the transaction was concluded, the Messenger of Allah (ﷺ) said: 'Choose (either to go ahead or to cancel the transaction).' The Bedouin said: 'May Allah grant you a long life of good transaction!"'

"Measure your food, may you be blessed therein."