Joshua 1:16

This answer was given not by the two tribes and a half only (though they are spoken of immediately before), but by the officers of all the people (Jos 1:10), as their representatives, concurring with the divine appointment, by which Joshua was set over them, and they did it heartily, and with a great deal of cheerfulness and resolution. I. They promise him obedience (v. 16), not only as subjects to their prince, but as soldiers to their general, of whose particular orders they are to be observant. He that hath soldiers under him saith to this man, Go, and he goeth; and to another, Come, and he cometh, Mat 8:9. Thus the people of Joshua; "All that thou commandest us we will readily do, without murmuring or disputing; and whithersoever thou sends us, though upon the most difficult and perilous expedition, we will go." We must thus swear allegiance to our Lord Jesus, as the captain of our salvation, and bind ourselves to do what he commands us by his word, and to go where he sends us by his providence. And since Joshua, being humbly conscious to himself how far short he came of Moses, feared he should not have such an influence upon the people and such an interest in them as Moses had, they here promise that they will be as obedient to him as ever they had been to Moses, Jos 1:17.

— Matthew Henry's Concise Commentary (public domain)