Kommentar zu Divrej Hajamim II 24:2

all the days of Jehoiada And in II Kings (12:3) it is written: “all his days, [he did] that which Jehoiada the priest instructed him,” but after he died, the officers of the king came to prostrate themselves to him and to deify him (below verse 17). In the midrash (Exod. Rabbah 8:2, Tan. Buber, Va’era) it is explained that, because he hid in the Holy of Holies and was not harmed, they said, “You are fit to be a god.”