Offerings unto Baal - A general name for all the popular idols; Baal, Moloch, Ashtaroth, etc.
Matthew Henry
Concise Bible Commentary
The prophet must give notice of ruin coming upon Judah and Jerusalem. Both rulers and ruled must attend to it. That place which holiness made the joy of the whole earth, sin made the reproach and shame of the whole earth. There is no fleeing from God's justice, but by fleeing to his mercy.
I commanded not. A figure of speech where emphasis is made by an understatement of the true situation. Not only had God not commanded these practices; He had forbidden them under the most severe penalties (see Lev. 18:21; 20:1-5; Deut. 12:31; 18:9, 10; Jer. 7:31).