מִדַּ֣ם חֲלָלִ֗ים מֵחֵ֙לֶב֙ גִּבּוֹרִ֔ים קֶ֚שֶׁת יְה֣וֹנָתָ֔ן לֹ֥א נָשׂ֖וֹג אָח֑וֹר וְחֶ֣רֶב שָׁא֔וּל לֹ֥א תָשׁ֖וּב רֵיקָֽם׃
From the blood of the slain, from the fat of the mighty, The bow of Jonathan turned not back, And the sword of Saul returned not empty.
Read midrashic interpretation of II Samuel 1:22: and classical rabbinic exegesis.