Psalm 72:6 uses rain imagery for a king's blessing — directly parallel to Job's people waiting for him as rain.

Deuteronomy 32:2 compares Moses' teaching to rain and dew — directly parallel to Job's speech dropping like rain.

Proverbs 16:15 compares a king's favor to latter rain — same metaphor Job uses for his own favor.

Hosea 6:3 compares God's coming to spring rains — similar metaphor to Job's words as rain.