Buyer and seller who differ

It is narrated from Sayyiduna Ibn Mas'ud (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "If the seller and the buyer disagree, the word of the seller is accepted, and the buyer has the choice: if he wishes he may go through with the sale, and if he wishes he may abandon it."

Al-Sha'bi (may Allah have mercy on him) said: If the seller and the buyer disagree and neither has witnesses, and the item sold remains in its original state, the word of the seller is accepted, or else the sale is annulled. If the item sold has perished, the word of the buyer is accepted, and the seller must produce witnesses.

Shurayh (may Allah have mercy on him) said: If the seller and the buyer disagree and the item sold is still present as it was, witnesses are requested from both. If one of them produces witnesses, it is given to him on the strength of his witnesses. If neither has witnesses, both are made to take an oath. If both take the oath, the sale is annulled, and if both refuse to take the oath, the sale is likewise annulled. If one takes the oath while the other refuses, it is given to the one who took the oath. If the item sold is not present as it was, or it has perished, the seller is charged with producing witnesses and the oath is imposed on the buyer.

Ibn Jurayj (may Allah have mercy on him) said: I said to Ata (may Allah have mercy on him): What if the seller and the buyer disagree over a sale? He (may Allah have mercy on him) said: If they do not straighten the matter out and they have no witnesses, the sale is to be annulled.