John Gill Commentary Deuteronomy 9:29

"Yet they are thy people and thine inheritance, which thou broughtest out by thy great power and by thine outstretched arm." — Deuteronomy 9:29 (ASV)

Yet they are your people
Though they had sinned against him:

and your inheritance ;
which he would not forsake and cast off; at least Moses hoped on this account he would not, and makes use of it as an argument with him why he should not, and which he repeats, adding in effect what he had said before:

which you brought out by your mighty power and stretched out arm ;
even out of the land of Egypt; the doing of which was plainly the effect of his almighty power, and an evidence of it, considering the weakness of Israel and the strength of Egypt, and the manner in which the Lord brought about this surprising event.