And he was with them hid in the house of God six years: and Athaliah reigned over the land. Hid in the house of God - "In the house of the sanctuary of God." - Targum. Or, as he says on 2 Chronicles 22:11, בקודש קודשיא bekudash kudeshaiya "in the holy of holies." To this place Athaliah had no access, therefore Joash lay concealed, he and his affectionate aunt-nurse. - See on 2 Kings 11:1 (note).
Commentary on the Bible, by Adam Clarke [1831].