'Abdullah said:
"I heard the Messenger of Allah (ﷺ) say: 'If the two parties to a transaction disagree, and neither of them has any proof, then it is as the owner of the goods says, or they may cancel it.'''
It was narrated that 'Abdul-Malik bin'Ubaid said:
"We were with Abu 'Ubaidah bin 'Abdullah bin Mas'ud when two men who were involved in a transaction came to him. One of them said: 'I bought it for such and such', and th…