Charles Ellicott Commentary Ezekiel 6:3

"and say, Ye mountains of Israel, hear the word of the Lord Jehovah: Thus saith the Lord Jehovah to the mountains and to the hills, to the watercourses and to the valleys: Behold, I, even I, will bring a sword upon you, and I will destroy your high places." — Ezekiel 6:3 (ASV)

To the rivers, and to the valleys. These words stand to each other in the same relation as “mountains and hills,” that is, they are specifications of the same general character. The word, frequently occurring, and uniformly translated in Ezekiel as rivers, would be better rendered ravines. It is a deep sort of valley, along which, at times, a stream might run. Such places were also favorite places for idolatrous rites (see 2 Kings 23:10; Isaiah 57:5–6; Jeremiah 7:31; Jeremiah 32:35), especially for the worship of the Phoenician Astaroth, the female divinity worshipped in conjunction with Baal.

The same grouping of mountains and hills, valleys and ravines, occurs again in Ezekiel 35:8; Ezekiel 36:4; Ezekiel 36:6. By the expression I, even I, strong emphasis is placed on the fact that these judgments are from God. Since, like most other events in the world, these judgments were to be brought about by human agency, attention might easily be focused on the secondary causes; but by thus declaring them beforehand, and claiming them as His own work, God would make it evident that everything was from Him.