Your wives, your little ones, and your cattle, shall abide in the land which Moses gave you beyond the Jordan; but you shall pass over before your brothers armed, all the mighty men of valor, and shall help them;
Now God is saying, "Look keep the law, don't deviate from it, for it is by this observing it day and night, meditating in it, thus thou shalt make thy way prosperous, thus you will have good success."