Moses
Deuteronomy 32:42BSB·traditional attribution

I will make My arrows drunk with blood, while My sword devours flesh—the blood of the slain and captives, the heads of the enemy leaders.”

John Calvin Reformed @genevareformer

42 I will make my arrows drunk with blood. In these words He describes a horrible massacre, as though He had said, There shall be no end to my vengeance, until the earth shall be full of blood and corpses. Elsewhere Jeremiah 46:10.

Matthew Henry Presbyterian @wholebiblehenry

This conclusion of the song speaks three things: I. Glory to God, Deu 32:39. "See now upon the whole matter, that I, even I, am he. Learn this from the destruction of idolaters, and the inability of their idols to help them." The great God here demands the glory, 1. Of a self-existence: I, even I, am he.

Commenting on Deuteronomy 32:39-43

John Gill Reformed Baptist @doctorgill

Rejoice, O ye nations, with his people,.... Or, "rejoice, ye nations", who are "his" people; so Kimchi and Ben Melech interpret it; the Gentiles, who are the Lord's chosen and covenant people, redeemed and called, and the fulness of them now brought in, and so matter of great rejoicing; or rather, as the Septuagint, which is approved and confirmed by the Apostle Paul, "rejoice, ye...