Who hath divided a watercourse for the overflowing of waters, or a way for the lightning of thunder;
Waters. Rain falls, not in a mass on one spot, but in countless separate canals in the air marked out for them.
Way for the lightning - (Job 28:26).
Related Commentaries of Job 38:25
Job 38:25
25 Who hath divided a watercourse for the overflowing of waters, or a way for the lightning of thunder;