3 verses have
painful
in Edition Clear Qur'an by Talal Itani / Al-Maaida (The Table)

5:36As for those who disbelieve, even if they owned everything on earth, and the like of it with it, and they offered it to ransom themselves from the torment of the Day of Resurrection, it will not be accepted from them. For them is a painful punishment.

5:73They disbelieve those who say, “God is the third of three.” But there is no deity except the One God. If they do not refrain from what they say, a painful torment will befall those among them who disbelieve.

5:94O you who believe! God will test you with something of the game your hands and spears obtain, that God may know who fears Him at heart. Whoever commits aggression after that will have a painful punishment.