אַשְׁכִּ֤יר חִצַּי֙ מִדָּ֔ם וְחַרְבִּ֖י תֹּאכַ֣ל בָּשָׂ֑ר מִדַּ֤ם חָלָל֙ וְשִׁבְיָ֔ה מֵרֹ֖אשׁ פַּרְע֥וֹת אוֹיֵֽב׃
De sangue embriagarei as minhas setas, e a minha espada devorará carne; do sangue dos mortes e dos cativos, das cabeças cabeludas dos inimigos
Rashi on Deuteronomy
אשכיר חצי מדם I WILL MAKE MY ARROWS DRUNK WITH BLOOD of the enemy,
Rashbam on Deuteronomy
פרעות, as in Leviticus 13,45 וראשו יהיה פרוע, “and the hair of his head shall grow wildly, untrimmed.” Basically, the word פרוע, describes something in disarray, undisciplined.
Sforno on Deuteronomy
אשכיר חצי מדם וחרבי תאכל בשר , similar to Isaiah 66,16 כי באש ה' נשפט ובחרבו את כל בשר, “for the Lord will contend with fire, with His sword against all flesh.”