I Chronicles 18:2 Midrash

וַיַּ֖ךְ אֶת־מוֹאָ֑ב וַיִּהְי֤וּ מוֹאָב֙ עֲבָדִ֣ים לְדָוִ֔יד נֹשְׂאֵ֖י מִנְחָֽה׃

And he smote Moab; and the Moabites became servants to David, and brought presents.

Read midrashic interpretation of I Chronicles 18:2: and classical rabbinic exegesis.