וּמְעוֹנֹתַ֖י הוֹלִ֣יד אֶת־עָפְרָ֑ה וּשְׂרָיָ֗ה הוֹלִ֤יד אֶת־יוֹאָב֙ אֲבִי֙ גֵּ֣יא חֲרָשִׁ֔ים כִּ֥י חֲרָשִׁ֖ים הָיֽוּ׃ (פ)
므오노대는 오브라를 낳았고 스라야는 요압을 낳았으니 요압은 게하라심의 조상이라 저희들은 공장이었더라
Rashi
And Seraiah begot Joab, the leader of Gei Harashim Joab was the leader of a valley in which there were craftsmen. Now why do I call it the Valley of Craftsmen? Because they were craftsmen; i. e., those who dwelt in the Valley of the Craftsmen were craftsmen, and the valley was named after them.