John Gill Commentary Psalms 124:8

"Our help is in the name of Jehovah, Who made heaven and earth." — Psalms 124:8 (ASV)

Our help [is] in the name of the Lord
This is the conclusion the church draws from the scene of Providence in her favour; this is the instruction she learns from hence, that her help is in the Lord only, and not in any creature; and that it is right to put her trust and confidence in the Lord for it, and only to expect it from him whose name is in himself; and is a strong tower to flee unto for safety, (Proverbs 18:10) . The Targum is, ``in the name of the Word of the Lord;'' in the Messiah; in whom the name of the Lord is, his nature and perfections; and in whom help is found, being laid upon him, (Exodus 23:21) (Hosea 13:9) (Psalms 89:19) ;

who made heaven and earth ;
and therefore must be able to help his people, and to do more for them than they are able to ask or think: for what is it he cannot do that made the heavens and the earth, and all that is in them? see (Psalms 121:1Psalms 121:2) .