A certain Sadducee asked Rabbi Abhu, "Since your God is a priest, as it
is written (Exod. xxv. 2), 'That they bring Me an offering,' in what did
He bathe Himself after He was polluted by the burial (Num. xix. 11, 18)
of the dead body of Moses? It could not be in the water, for it is
written (Isa. xl. 12), 'Who has measured the waters in the hollow of His
hand?' which therefore are insufficient for Him to bathe in." The Rabbi
replied, "He bathed in fire, as it is written (Isa. lxvi. 15), 'For
behold the Lord will come with fire.'"
THE TALMUD, _Sanhedrin_, fol. 39, col. 1.