Adam Clarke on Psalms 37:24

Though he fall, he shall not be utterly cast down - The original is short and emphatic כי יפל לא יוטל ki yippol, lo yutal, which the Chaldee translates, "Though he should fall into sickness, he shall not die;" for which the reason is given, because the Lord sustains by his hand. Though he may for a time fall under the power of his adversaries, as the Jews have done under the Babylonish captivity, he shall not be forsaken. The right hand of God shall sustain him in his afflictions and distresses; and at last God will give him a happy issue out of them all. Neither the tent nor any of the Versions intimate that a falling into sin is meant; but a falling into trouble, difficulty, etc.