At that time I also pleaded with the LORD:
23 And I besought the Lord. “I had besought, etc.” — Lat. Others have, “I besought;” but I have preferred using the pluperfect tense, because, in my opinion, Moses interrupts himself to show why he had resigned his office to another, and did not rather declare that he would be their leader, as heretofore, and at the same time an example to the people of courage.
Here is I. The encouragement which Moses gave to Joshua, who was to succeed him in the government, Deu 3:21, Deu 3:22. He commanded him not to fear. This those that are aged and experienced in the service of God should do all they can to strengthen the hands of those that are young, and setting out in religion.
Commenting on Deuteronomy 3:21-29
O Lord God, thou hast begun to show thy servant thy greatness and thy mighty hand,.... To give a specimen of the greatness of his power in subduing the two kings and their kingdoms, and delivering them up into the hands of the Israelites.