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 you who believe, when death draws near one of you, that is, at the time of making a will, the evidence (recognized) between you shall be of two witnesses from among you, or of two others not from you, if you are travelling on the earth and the trauma of death visits you. (Then) you shall detain them after the prayer, if you have some doubt, and they shall swear by Allah, “We shall not take a price for it, even if there be a relative; and we shall not conceal the evidence (as due) of Allah, otherwise we should certainly be among the sinners.”