Verse 34. - Fear him not. He might well have been formidable, not only on account of his size (cf. Deuteronomy 1:28; Deuteronomy 3:11; 1 Samuel 17:11), but from the formidable nature of those walled cities which are still a wonder to all that see them.

21:21-35 Sihon went with his forces against Israel, out of his own borders, without provocation, and so ran upon his own ruin. The enemies of God's church often perish by the counsels they think most wisely taken. Og, king of Bashan, instead of being warned by the fate of his neighbours, to make peace with Israel, makes war with them, which proves in like manner his destruction. Wicked men do their utmost to secure themselves and their possessions against the judgments of God; but all in vain, when the day comes on which they must fall. God gave Israel success, while Moses was with them, that he might see the beginning of the glorious work, though he must not live to see it finished. This was, in comparison, but as the day of small things, yet it was an earnest of great things. We must prepare for fresh conflicts and enemies. We must make no peace or truce with the powers of darkness, nor even treat with them; nor should we expect any pause in our contest. But, trusting in God, and obeying his commands, we shall be more than conquerors over every enemy.And the Lord said unto Moses, fear him not,.... Og being of a gigantic stature, and his forces numerous, might cause some fear in Moses, and in the people, and therefore the Lord encouraged them not to be afraid of him and his army:

for I have delivered him into thy hand, and all his people, and his land; that is, he had determined to do it, and now promised it, and it might be depended on and looked upon as if actually done:

and thou shalt do to him as thou didst unto Sihon king of the Amorites, which dwelt at Heshbon; slay him and his people, and take possession of his country.