Deuteronomy 8:19

8:19 Now if you forget the Lord your God at all and follow other gods, worshiping and prostrating yourselves before them, I testify to you today that you will surely be annihilated.

Deuteronomy 11:28

11:28 and the curse if you pay no attention to his commandments and turn from the way I am setting before you today to pursue other gods you have not known.

Exodus 34:14-16

34:14 For you must not worship any other god, for the Lord, whose name is Jealous, is a jealous God. 34:15 Be careful not to make a covenant with the inhabitants of the land, for when they prostitute themselves to their gods and sacrifice to their gods, and someone invites you, you will eat from his sacrifice; 34:16 and you then take his daughters for your sons, and when his daughters prostitute themselves to their gods, they will make your sons prostitute themselves to their gods as well.

Jeremiah 25:6

25:6 Do not pay allegiance to other gods and worship and serve them. Do not make me angry by the things that you do. Then I will not cause you any harm.’

Jeremiah 25:1

Seventy Years of Servitude for Failure to Give Heed

25:1 In the fourth year that Jehoiakim son of Josiah was king of Judah, the Lord spoke to Jeremiah concerning all the people of Judah. (That was the same as the first year that Nebuchadnezzar was king of Babylon.)

Jeremiah 5:21

5:21 Tell them: ‘Hear this,

you foolish people who have no understanding,

who have eyes but do not discern,

who have ears but do not perceive: