I. What is the cause and ground of that controversy, v. 5. God espouses his people's cause, and will plead it, takes what is done against them as done against himself, and will reckon for it; and it is upon their account that God now contends with the Edomites. 1. Because of the enmity they had against the people of God, that was rooted in the heart. "Thou hast had a perpetual hatred to them, to the very name of an Israelite." The Edomites kept up an hereditary malice against Israel, the same that Esau bore to Jacob, because he got the birth-right and the blessing. Esau had been reconciled to Jacob, had embraced and kissed him (Gen. xxxiii.), and we do not find that ever he quarrelled with him again. But the posterity of Esau would never be reconciled to the seed of Jacob, but hated them with a perpetual hatred. Note, Children will be more apt to imitate the vices than the virtues of their parents, and to tread in the steps of their sin than in the steps of their repentance. Parents should therefore be careful not to set their children any bad example, for though, through the grace of God, they may return, and prevent the mischief of what they have done amiss to themselves, they may not be able to obviate the bad influence of it upon their children. It is strange how deeply rooted national antipathies sometimes are, and how long they last; but it is not to be wondered at that profane Edomites hate pious Israelites, since the old enmity that was put between the seed of the woman and the seed of the serpent (Gen. iii. 15) will continue to the end. Marvel not if the world hate you. 2. Because of the injuries they had done to the people of God. They shed their blood by the force of the sword, in the time of their calamity; they did not attack them as fair and open enemies, but laid wait for them, to cut off those of them that had escaped (Obad. 14), or they drove them back upon the sword of the pursuers, by which they fell. It was cowardly, as well as barbarous, to take advantage of their distress; and for neighbours, with whom they had lived peaceably, to smite them secretly when strangers openly invaded them. It was in the time that their iniquity had an end, when the measure of it was full and destruction came. Note, Even those that suffer justly, and for their sins, are yet to be pitied and not trampled upon. If the father corrects one child, he expects the rest should tremble at it, not triumph in it.