וַיָּבֹ֤א דָוִד֙ אֶל־צִ֣קְלַ֔ג וַיְשַׁלַּ֧ח מֵֽהַשָּׁלָ֛ל לְזִקְנֵ֥י יְהוּדָ֖ה לְרֵעֵ֣הוּ לֵאמֹ֑ר הִנֵּ֤ה לָכֶם֙ בְּרָכָ֔ה מִשְּׁלַ֖ל אֹיְבֵ֥י יְהוָֽה׃
David kam nach Ziklag und sandte von der Beute an die Ältesten Jehudas, an alle seine Bekannten, mit den Worten: Hier habt ihr ein Geschenk von der Beute der Feinde des Herrn.
Sforno
וחצית את המלקוח, seeing that this war was a war of revenge for something the enemy had done against the people as a whole, the Torah wanted that the principle of ואכלת את אויביך, “you will consume your enemies,” (Deuteronomy 20,14) be fulfilled. Something similar occurred with David and the loot taken from Amalek (Samuel I 30,26) when he distributed loot he personally had captured from the Amalekites.