Matthew Henry on Psalms 124:1-5

God suffers the enemies of his people sometimes to prevail very far against them, that his power may be seen the more in their deliverance. Happy the people whose God is Jehovah, a God all-sufficient. Besides applying this to any particular deliverance wrought in our days and the ancient times, we should have in our thoughts the great work of redemption by Jesus Christ, by which believers were rescued from Satan.