God’s mercy necessities existence of Resurrection, human tends to have an everlasting life. God’s mercy leads all creatures throughout the universe especially human towards perfection, therefore he has created Resurrection, it is against his mercy to leave his servants with no reward granted to:
1- Our Lord, you embrace everything through mercy and knowledge. (40:7)
2- say: “who owns whatever is in heaven and Earth?” - Say: “God does. He has prescribed mercy for Himself so he gathers you in on Resurrection Day , concerning which there is no doubt, yet those who have lost their souls will never believe” (6:12)
3-there is no animal which he dies grasp its forelock. My Lord is on a straight Rood (11:56)
4-praise be to God, Lord of universe, the Mercy–giving , the Merciful Ruler on the Day for Repayment! ( 1:2-4)