Maulana Mohammad Ali:
O you who believe, call to witness between you, when death draws nigh to one of you, at the time of making the will, two just persons from among you, or two others from among others than you, if you are travelling in the land and the calamity of death befalls you. You should detain them after the prayer. Then if you doubt (them), they shall both swear by Allah (saying): We will not take for it a price, though there be a relative nor will We hide the testimony of Allah, for then certainly We shall be sinners.
Surah Al Maidah (The Table Spread with Food) Ayat 107