Charles Ellicott Commentary Isaiah 41:14

"Fear not, thou worm Jacob, and ye men of Israel; I will help thee, saith Jehovah, and thy Redeemer is the Holy One of Israel." — Isaiah 41:14 (ASV)

Fear not, you worm Jacob. —The servant of Jehovah is reminded that he has no strength of his own, but is as a worm, and no man (Psalms 22:6). He had not been chosen because he was a great and mighty nation, for Israel was the fewest of all people (Deuteronomy 7:7). As if to emphasize this, the prophet in addressing Israel passes from the masculine to the feminine, resuming the former in the second clause of Isaiah 41:15, where he speaks of its God-given strength.

Your redeemer ... — that is, the Goel of Leviticus 25:48-49, the next of kin, who was the protector, the deliverer, of his brothers (Leviticus 25:43–49). Looking to the numerous traces of the influence of the Book of Job in 2 Isaiah, it seems not improbable that we have in these words an echo of the hope, I know that my Redeemer liveth (Job 19:25).