A Tzeduki — a Sadducee, member of the party that rejected the Oral Torah — once came to Rabbi Abhu with a question meant to sting.
"Your God is a priest," he said, "for it is written, 'Let them take for Me an offering' (Exodus 25:2). Well then — after He buried the body of Moses (Deuteronomy 34:6, and compare the laws of corpse-impurity in Numbers 19:11-18), He was defiled by contact with the dead. In what did He bathe to purify Himself? Not in water, for Isaiah declared, 'Who has measured the waters in the hollow of His hand?' (Isaiah 40:12). The oceans do not suffice for Him to wash in."
The Sadducee was proud of his trap. But Rabbi Abhu did not flinch.
"He bathed in fire," said the rabbi, "as it is written, 'For behold, the Lord will come with fire' (Isaiah 66:15)."
The answer is playful, but it carries a theology underneath. The Holy One is not a priest bound by the rules of the priesthood; He is the One before whom those rules were spoken. To ask how the Infinite bathes is to ask a question whose premises dissolve the moment the Infinite answers.