Numbers 21:17
Then Israel sang this song, Spring up, O well; sing ye unto it:
Then Israel sang this song,.... Being affected with the free favour and good will of God towards them:
Spring up, O well; for the springing up of which they prayed in faith, believing in the promise of God, that it would spring up; and so encouraged one another not only to believe it, but even to sing on account of it before it actually did:
sing ye unto it; or on account of it praise the Lord for it; or "answer to it" {m}, it being their manner to sing their songs by responses, or alternately.
{m} hl wne "respondete ei", Montanus; "alternis canite ei", Tigurine version, Piscator.
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