27 So the makers of wise sayings say, Come to Heshbon, building up the town of Sihon and making it strong: 28 For a fire has gone out of Heshbon, a flame from the town of Sihon: for the destruction of Ar in Moab, and the lords of the high places of the Arnon. 29 Sorrow is yours, O Moab! Destruction is your fate, O people of Chemosh: his sons have gone in flight, and his daughters are prisoners, in the hands of Sihon, king of the Amorites. 30 They are wounded with our arrows; destruction has come on Heshbon, even to Dibon; and we have made the land waste as far as Nophah, stretching out to Medeba.
Matthew Henry's Commentary on Numbers 21:27-30
Commentary on Numbers 21:21-35
(Read Numbers 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.