John Calvin Commentary Deuteronomy 26:15

"Look down from thy holy habitation, from heaven, and bless thy people Israel, and the ground which thou hast given us, as thou swarest unto our fathers, a land flowing with milk and honey." — Deuteronomy 26:15 (ASV)

Look down from thy holy habitation. While they are commanded to offer their prayers and supplications that God would bless the land, on the condition that they had not defiled themselves by any sacrilege, they are at the same time reminded, on the other hand, that God’s blessing was not otherwise to be hoped for.

Meanwhile, the expression is remarkable, Bless the land which thou hast given us, a land that floweth with milk and honey: for from this we infer that the land was not so much fertile by nature, as because God daily watered it by His secret blessing to make it so.