The LORD will deliver them over to you, and you must do to them exactly as I have commanded you.
Loth to part (we say) bids oft farewell. Moses does so to the children of Israel: not because he was loth to go to God, but because he was loth to leave them, fearing that when he had left them they would leave God.
Commenting on Deuteronomy 31:1-8
Be strong and of a good courage,.... The Septuagint version is,"play the men, and be strong;''be strong in the Lord, and in the power of his might, trusting and relying on him that goes before you; and so take heart, and be of good courage, and act the manly part; the apostle seems to refer to this passage, Co1 16:13, fear not, nor be afraid...
And the LORD shall give them up before your face, that ye may do unto them according unto all the commandments which I have commanded you. (b) Into your hands.