2 verses have
painful
in Edition Clear Qur'an by Talal Itani / Yunus (Jonas)

10:88Moses said, “Our Lord, you have given Pharaoh and his chiefs splendor and wealth in the worldly life. Our Lord, for them to lead away from Your path. Our Lord, obliterate their wealth, and harden their hearts, they will not believe until they see the painful torment.”

10:97Even if every sign comes to them—until they see the painful punishment.