George Haydock's Catholic Commentary
Psalms 118:122
Uphold. Hebrew, "answer for," (St. Jerome) as a bondsman. --- Unto good. Thus the law is insinuated, though it is not here expressed. (Berthier) --- In attacking the devil, who is so experienced, we must take God with us, or we shall surely be overcome. (St. Augustine, tr. 4. in Joan.)