The horses of the sun were horses dedicated to sun worship, together with chariots placed at the entrance of the temple in Jerusalem. They formed part of the idolatrous practices removed during Josiah’s reform.
Josiah took away the horses and burned the chariots with fire. Their removal is recorded in connection with the wider destruction of sun-worship practices in the temple.
Horses sacred to the sun were common among oriental peoples. In Jerusalem they had been associated with the sun worship practiced by idolatrous kings.