Joshua 1:2

“Moses my servant is dead, etc.] Which was said not for the information of Joshua, but to lead on to, and show the cause and reason of what he was about to say to him: now therefore arise, go over this Jordan; near to which the whole body of the people of Israel were, and very probably were in sight of it: thou, and all this people: which were very numerous, six hundred thousand men or more, besides a great number of women and children, and no boats to carry them over, or pontoons to put across the river: unto the land which I give unto them, [even] to the children of Israel; and therefore it could be no case of conscience with Joshua, to go and take it out of the hands of the present…”

“now therefore arise, go over this Jordan--Joshua's mission was that of a military leader. This passage records his call to begin the work, and the address contains a literal repetition of the promise made to Moses (Deu 11:24-25; Deu 31:6-8, Deu 31:23).”

“Now therefore arise - Let not the withering of the most useful hands be the weakening of ours. When God has work to do, he will either find or make instruments fit to carry it on. Moses the servant is dead; but God the master is not: he lives forever. This Jordan - Which is now near thee, which is the only obstacle in thy way to Canaan. Which I give - That is, am now about to give thee actual possession of it, as I formerly gave a right to it by promise. Joshua 1:3”

“Moses: Jos 1:1; Isa 42:1; Heb 3:5, Heb 3:6, Heb 7:23, Heb 7:24 arise: Num 27:16-21; Deu 3:28, Deu 31:7 Joshua 1:3”

“As Moses had died without having brought the Israelites to Canaan, Joshua was to arise and go with all the nation over this Jordan (i.e., the river then before him) into the land which the Lord would give them. Joshua 1:3”