Al-Ma'idah 5:106 يا ايها الذين امنوا شهادة بينكم اذا حضر احدكم الموت حين الوصية اثنان ذوا عدل منكم او اخران من غيركم ان انتم ضربتم في الارض فاصابتكم مصيبة الموت تحبسونهما من بعد الصلاة فيقسمان بالله ان ارتبتم لا نشتري به ثمنا ولو كان ذا قربى ولا نكتم شهادة الله انا اذا لمن الاثمين ١٠٦

O ye who believe! Let there be witnesses between you when death draweth nigh unto one of you, at the time of bequest - two witnesses, just men from among you, or two others from another tribe, in case ye are campaigning in the land and the calamity of death befall you. Ye shall empanel them both after the prayer, and, if ye doubt, they shall be made to swear by Allah (saying): We will not take a bribe, even though it were (on behalf of) a near kinsman nor will we hide the testimony of Allah, for then indeed we should be of the sinful.