The verse states: “And the daughter of Pharaoh came down to bathe [lirḥotz] in the river” (Exodus 2:5). Rabbi Yoḥanan says in the name of Rabbi Shimon ben Yoḥai: This teaches that she came down to the river to cleanse herself from the impurity of her father’s idols, as she was immersing herself as part of the conversion process. And similarly it states: “When God shall have washed [raḥatz] away the filth of the daughters of Zion, and shall have purged the blood of Jerusalem from the midst thereof, by the spirit of judgment, and by the spirit of destruction” (Isaiah 4:4). This washing clearly refers to the purging of spiritual sins, rather than bathing for the sake of cleanliness.