Charles Ellicott Commentary Psalms 118:9

"It is better to take refuge in Jehovah Than to put confidence in princes." — Psalms 118:9 (ASV)

Trust. —The word constantly used of the security the Israelite found in his relation to Jehovah. The meaning here is apparently, “Fidelity to the covenant is better than alliance with foreign princes,” though, of course, the larger sense, in which the words are applicable to all men, may be read into the words.