Albert Barnes Commentary Deuteronomy 33:28

"And Israel dwelleth in safety, The fountain of Jacob alone, In a land of grain and new wine; Yea, his heavens drop down dew." — Deuteronomy 33:28 (ASV)

The fountain of Jacob shall be upon a land of corn and wine - The King James Version does not preserve the symmetry of the clauses. Render it: “Israel shall dwell in safety; alone shall the fountain of Jacob be” (Isaiah 48:1); “in a land,” etc.