Radak

One that is committed to the Lord: – גל (one that is committed) is an adjective of similar form to (חם) in “bread that is hot (חם)” (1 Sam. 21:7); (and to תֹּם in) “the way of the Lord is a strong-hold to the upright (תֹּם)” (Prov. 10:29). (One is meant) who turns his ways and his requests and prayers unto the Lord; Him He will deliver, He will rescue him: seeing He delighteth in him: – seeing that the Lord delighteth in him and hears his prayer, cf “If the Lord delight in us” (Num. 14:8). Or its interpretation may be: “seeing he, man, delighteth in God”; as “Because he has set his love upon Me, therefore will I deliver him” (Ps. 91:14). It is equivalent to saying: “Many a time have we seen and heard this, that when one turns his ways and prayer unto God, He delivers him. If this be so, why dost Thou not save us, for, as for ourselves, our eyes (look) unto Thee?”