Verse 15. Thou didst cleave the fountain and the flood. Jordan was divided by Jehovah's power; the Lord is able to repeat his miracles, what he did with a sea, he can do with a river; lesser difficulties shall be removed as well as greater ones. Perhaps the fountain refers to the smitten rock, which from its cleft poured forth a perpetual stream; so the Lord opens to us springs of water in the wilderness.
Thou driedst up mighty rivers, rivers which were permanent, and not like the transient torrents of the land, were dried up for awhile; the Jordan itself, being such, was laid dry for a season. Observe the repetition of the pronoun "thou;" the song is all for God, and the prayer is all directed to him. The argument is that he who wrought such wonders would be pleased to do the like now that an emergency had arisen.
EXPLANATORY NOTES AND QUAINT SAYINGS
Verse 15. Flood. God in dividing Jordan did not only divide the water that ordinarily belonged to the river, or the water which came from its fountains, but also the extraordinary additional waters by the great rains a little before harvest. So God cleaved both the fountain, i.e., the fountain water, and the flood. Jonathan Edwards.
HINTS FOR PASTORS AND LAYPERSONS
Verse 15. The wonderful nature of gracious supplies, illustrated by the smitten rock.