Psalms 136:19

“To him which smote great kings - On this passage see the notes at Psalms 135:10-12. There is little difference in the two places, except that here the statement is divided by the refrain, “For his mercy endureth forever.” The idea in the whole passage, in view of the divine interposition in slaying the mighty kings, and in giving their land for a possession to the Hebrew people, is, that it was a proof of mercy and benevolence. It is benevolence to mankind and to the church of God - it is in the interests of humanity, of domestic peace, and of the charities of life, to remove wicked people from the world. This mercy may be manifested further, not merely in removing the wicked, but in…”

“Num 21:21, Num 21:23; Deu 2:30-36, Deu 29:7 Psalms 136:20”