‘O Allaah, forgive me, have mercy upon me and unite me with the highest companions.’
‘Aaishah related that the Prophet (S) (during his illness in which he passed away) would dip his hands in water and then he would wipe his face and say:
‘None has the right to be worshipped except Allaah, death does indeed contain agony.’
‘None has the right to be worshipped except Allaah and Allaah is the greatest. None has the right to be worshipped except Allaah, alone. None has the right to be worshipped except Allaah, alone, without partner. None has the right to be worshipped except Allaah, to Him belongs all sovereignty and praise. None has the right to be worshipped except Allaah and there is no might and no power except with Allaah.’
From makedua.com