5:106O you who believe! When death approaches one of you, let two reliable persons from among you act as witnesses to the making of a bequest, or two persons from another people if you are travelling in the land and the event of death approaches you. Engage them after the prayer. If you have doubts, let them swear by God: “We will not sell our testimony for any price, even if he was a near relative, and we will not conceal God’s testimony, for then we would be sinners.”

5:107If it is discovered that they are guilty of perjury: let two others take their place, two from among those responsible for the claim, and have them swear by God, “Our testimony is more truthful than their testimony, and we will not be biased, for then we would be wrongdoers.”

5:108That makes it more likely that they will give true testimony, fearing that their oaths might be contradicted by subsequent oaths. So fear God, and listen. God does not guide the disobedient people.