Reference for I Chronicles 18:15

וְיוֹאָ֥ב בֶּן־צְרוּיָ֖ה עַל־הַצָּבָ֑א וִיהוֹשָׁפָ֥ט בֶּן־אֲחִיל֖וּד מַזְכִּֽיר׃

And Joab the son of Zeruiah was over the host; and Jehoshaphat the son of Ahilud was recorder.