וּמְעוֹנֹתַ֖י הוֹלִ֣יד אֶת־עָפְרָ֑ה וּשְׂרָיָ֗ה הוֹלִ֤יד אֶת־יוֹאָב֙ אֲבִי֙ גֵּ֣יא חֲרָשִׁ֔ים כִּ֥י חֲרָשִׁ֖ים הָיֽוּ׃ (פ)
米奧諾太生俄弗拉；西萊雅生約押，約押是匠人谷的首領，因為他們都是匠人。
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.