By a special act of Pope St. Pius X, on March 9, 1904, a plenary indulgence, to be gained at the moment of death, was attached to the following prayer, even when recited in full health long before death, after Confession and Communion. Source, 1962 Roman Catholic Daily Missal.

O Lord my God, I now, from this moment do I accept from Thy hands, with burning love and sincere contrition, with a calm and willing disposition, whatsoever death Thou shalt choose to send me, with its pains and griefs. Amen.