John Gill 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 your holy habitation, from heaven
This is a prayer of the person that makes the above declaration annexed to it, desiring that God would vouchsafe to look with an eye of love, complacency, and delight, upon him and upon all his people, from heaven his holy habitation, though they were on earth, and unholy persons in themselves, and especially if compared with him; see (Isaiah 57:15) (63:15) ;

and bless your people Israel ;
with blessings temporal and spiritual:

and the land which you have given us ;
with fertility and plenty of all good things, that it might be

as you swore to our fathers, a land flowing with milk and honey ;
(See Gill on Deuteronomy 26:9).