And I commanded Joshua at that time,.... After the conquest of the two kings, and the assignment of their countries to the above tribes; and after Moses had it made known to him that he should quickly die, and Joshua should be his successor; then, by the direction of God, he gave him the following charge:

saying, thine eyes have seen all that the Lord your God hath done unto these two kings; Sihon and Og; how their kingdoms were taken from them, and given to Israel, and they slain with the sword; this Joshua was an eyewitness of, and was, no doubt, greatly concerned in the battles with them, being the general in the Israelitish armies; at least this was sometimes his post, and he cannot be thought to have been unemployed in these wars:

so shall the Lord do unto all the kingdoms whither thou passest; all the kingdoms in the land of Canaan, where there were many, thirty one at least; these would be all conquered and put into the hands of the Israelites, and their kings slain.

Nomination of Joshua as his Successor. - This reminiscence also recalls the goodness of God in the appointment of Joshua (Numbers 27:12.), which took place "at that time," i.e., after the conquest of the land on the east of the Jordan. In accordance with the object of his address, which was to hold up to view what the Lord had done for Israel, he here relates how, at the very outset, he pointed Joshua to the things which he had seen with his eyes (הראת עיניך, thine eyes were seeing; cf. Ewald, 335, b.), namely, to the defeat of the two kings of the Amorites, in which the pledge was contained, that the faithful covenant God would complete the work He had begun, and would do the same to all kingdoms whither Joshua would go over (i.e., across the Jordan).

And I commanded Joshua at that time, saying, Thine eyes have seen all that the {h} LORD your God hath done unto these two kings: so shall the LORD do unto all the kingdoms whither thou passest.

(h) So that the victories did not come by your own wisdom, strength or multitude.

3:21-29 Moses encouraged Joshua, who was to succeed him. Thus the aged and experienced in the service of God, should do all they can to strengthen the hands of those who are young, and setting out in religion. Consider what God has done, what God has promised. If God be for us, who can be against us, so as to prevail? We reproach our Leader if we follow him trembling. Moses prayed, that, if it were God's will, he might go before Israel, over Jordan into Canaan. We should never allow any desires in our hearts, which we cannot in faith offer up to God by prayer. God's answer to this prayer had a mixture of mercy and judgment. God sees it good to deny many things we desire. He may accept our prayers, yet not grant us the very things we pray for. It God does not by his providence give us what we desire, yet if by his grace he makes us content without, it comes to much the same. Let it suffice thee to have God for thy Father, and heaven for thy portion, though thou hast not every thing thou wouldst have in the world. God promised Moses a sight of Canaan from the top of Pisgah. Though he should not have the possession of it, he should have the prospect of it. Even great believers, in this present state, see heaven but at a distance. God provided him a successor. It is a comfort to the friends of the church of Christ, to see God's work likely to be carried on by others, when they are silent in the dust. And if we have the earnest and prospect of heaven, let these suffice us; let us submit to the Lord's will, and speak no more to Him of matters which he sees good to refuse us.