John Gill Commentary Psalms 121:2

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

My help [comes] from the Lord, who made heaven and earth .
Who helps his people out of the hands of all their enemies, and out of all their troubles and afflictions; he helps them in the performance of duty, in the exercise of grace, in bearing the cross, in fighting the Lord's battles, and on in their journey; he helps them to all blessings, temporal and spiritual; to all needful supplies of grace here, and glory hereafter; and this help he gives is quick and present, suitable and seasonable, is sufficient, and sometimes with, and sometimes without means; and they have great encouragement to expect it from him, since he is able to give it, being the Maker of heaven and earth; for what is it that he cannot do, who has made both them?

And besides, he has promised to help them, and he is faithful that has promised; he has laid help on Christ for them, and set up a throne of grace, where they may hope to find grace and mercy, to help them in time of need; and they have had past experiences of his help and salvation.

Arama connects this with the preceding psalm, and interprets this help of help from an evil tongue.