The first commandment 20:3

This was a call to monotheism and faithfulness to the Lord. Israel was to have no other gods besides Yahweh. He was not just to be the first among several but the only One (cf. 1 Cor. 10:31; 1 Tim. 2:5; Acts 14:15; James 2:19; 1 John 5:20-21).³³⁰

"Yahweh had opened himself to a special relationship with Israel, but that relationship could develop only if Israel committed themselves to Yahweh alone. Yahweh had rescued them and freed them, delivered them and guided them, then come to them. The next step, if there was to be a next step, belonged to them. If they were to remain in his Presence, they were not to have other gods."³³¹