Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) narrates this statement of the Noble Prophet (peace and blessings be upon him): "A transaction between two people engaged in buying and selling is not complete until they separate from each other, except in the case of a transaction in which there is an option (to cancel later); its ruling is different."

Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) narrates this statement of the Noble Prophet (peace and blessings be upon him): "When a person buys something, it becomes binding upon him, and he has the right regarding it over his companion until he separates from him. If he wishes, he may take it, and if he wishes, he may leave it. But if he separates from his companion, then he will no longer have any choice."

This narration is also transmitted with another chain from Sayyiduna Abdullah bin Umar (may Allah be pleased with them both).

Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) narrates this statement of the Noble Prophet (peace and blessings be upon him): "Both parties involved in a transaction retain the right of option regarding the other party as long as they do not separate from each other; however, the ruling of 'Bay' al-Khiyar' (sale with option) is different."

Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) narrates this statement of the Prophet Muhammad (peace be upon him): "When two men make a transaction, each of them has the right (to cancel the transaction) as long as they have not separated from each other and remain together, or until one of them gives the other (the right to cancel the transaction later). If one of them gives the other the right of option and they make the transaction on that condition, then the transaction is finalized. And if, after finalizing the transaction, they separate and neither of them has abandoned the sale, then the sale becomes binding."

Sayyiduna Miqdam bin Ma'dikarib رضي الله عنه narrates that the Prophet Muhammad صلى الله عليه وسلم said: "Measure your grain, for there will be blessing placed in it for you."

Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) narrates: When the Prophet Muhammad (peace and blessings be upon him) arrived in Madinah, the people there used to cheat the most in measuring. So Allah Almighty revealed this verse: "Woe to those who give less in measure." After that, those people began to measure properly.

Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) narrates: I used to sell camels in Baqi'. I would sell camels for dinars and receive dirhams, or I would sell for dirhams and receive dinars. I came to the service of the Prophet (peace and blessings of Allah be upon him). At that time, you were present in the house of Sayyidah Hafsah (may Allah be pleased with her). I said: O Messenger of Allah (peace and blessings of Allah be upon him)! I sold camels in Baqi'. I sold them for dinars and received dirhams instead of dinars, or I sold them for dirhams and received dinars instead. The Prophet (peace and blessings of Allah be upon him) said: There is no harm in this when you receive payment according to the value of that day, and both of you (parties) separate in such a state that there is no (condition of deferred payment) between you.

Sayyiduna Abdullah bin Umar (may Allah be pleased with them) narrates that the Prophet Muhammad (peace be upon him) said: "Whoever buys a date-palm tree after it has been pollinated, and does not stipulate (at the time of transaction) a condition regarding its fruit, then he will get nothing of it. And whoever buys a slave and does not stipulate a condition regarding the wealth he possesses, then he will get nothing of it."

Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) narrates: I heard the Prophet Muhammad (peace be upon him) say: "Whoever buys a date-palm orchard after it has been pollinated, its fruit will belong to the one who sold it, unless the buyer has stipulated a condition (then the ruling will be different). And whoever buys a slave who possesses some property, that property will belong to the seller, unless the buyer has stipulated a condition (then the ruling will be different)."