וַיִּקַּ֣ח דָּוִ֔ד אֶת־כָּל־הַצֹּ֖אן וְהַבָּקָ֑ר נָהֲג֗וּ לִפְנֵי֙ הַמִּקְנֶ֣ה הַה֔וּא וַיֹּ֣אמְר֔וּ זֶ֖ה שְׁלַ֥ל דָּוִֽד׃
And David took all the flocks and the herds, which they drove before those other cattle, and said: ‘This is David’s spoil.’
Read midrashic interpretation of I Samuel 30:20: and classical rabbinic exegesis.