Exodus 20:3 "You shall have no other gods before me."
Nahum 1:2, 6- The LORD is a jealous and avenging God; the LORD takes vengeance on his foes and maintains his wrath against his enemies... Who can withstand his indignation? Who can endure his fierce anger? His wrath is poured out like fire; the rocks are shattered before him."
Exodus 34:14 "Do not worship any other god, for the LORD, whose name is Jealous, is a jealous God
Is 48:11 "I will not yield my glory to another"
Isaiah 45: 21-22- Declare what is to be, present it— let them take counsel together. Who foretold this long ago, who declared it from the distant past? Was it not I, the LORD ? And there is no God apart from me, a righteous God and a Savior; there is none but me. 22 "Turn to me and be saved, all you ends of the earth; for I am God, and there is no other.