וַיַּ֤עַשׂ דָּוִד֙ שֵׁ֔ם בְּשֻׁב֕וֹ מֵהַכּוֹת֥וֹ אֶת־אֲרָ֖ם בְּגֵיא־מֶ֑לַח שְׁמוֹנָ֥ה עָשָׂ֖ר אָֽלֶף׃
And David got him a name when he returned from smiting the Arameans in the Valley of Salt, even eighteen thousand men.
Read midrashic interpretation of II Samuel 8:13: and classical rabbinic exegesis.