Charles Ellicott Commentary Psalms 121:2

"My help [cometh] from Jehovah, Who made heaven and earth." — Psalms 121:2 (ASV)

My help cometh ... —Not as the superstition of the Canaanite said, from the sacred summits themselves, but from their Creator’s Lord. It is noticeable that the style, maker of heaven and earth, is a peculiarity of psalms which are certainly post-exile, and show how strongly the contrast with heathenism impressed the creative power of God on the Hebrew mind. When the idolater, pointing to his visible god, taunted the Israelite with having no god, the reply, that He made the heavens, and the earth, and all things, and that these were the proofs of His being, was most natural. (See Jeremiah 10:11.)