“Abu ‘ Abd Allah (a.s.), has said, ‘If a man buys something from another man, he has the choice to dismiss the deal before they depart each other. When they depart the deal becomes binding.’ He (the narrator) has said, ‘Abu ‘Abd Allah (a.s.), then said, ‘My father once purchased a piece of land called “al-‘Arid”. He purchased it for a few dinars and said to the seller. “I will give you a leaf (silver) for every dinar ten dirhams.” He purchased it and moved. I followed him and asked, “O father, why did you move so quickly?” He (the Imam) replied, “I wanted the transaction to become binding.’””