Albert Barnes Commentary Psalms 107:41

"Yet setteth he the needy on high from affliction, And maketh [him] families like a flock." — Psalms 107:41 (ASV)

Yet he sets the poor on high from affliction - In the margin, it reads “after.” The meaning is not significantly different. The idea is that while he thus humbles princes, bringing them down from their lofty position, he has respect for the poor in their condition of suffering and trial, raises them from that depressed state, and gives them prosperity. Thus he orders the circumstances of people and shows his sovereignty.

And makes him families like a flock - Numerous as a flock. Large families were considered a blessing among the Hebrews. See the notes at Psalms 107:38.