Cross reference
Leviticus 15:6
6 `And he who is sitting on the vessel on which he sitteth who hath the issue, doth wash his garments, and hath bathed with water, and been unclean till the evening.
Isaiah 1:16
16 Wash ye, make ye pure, Turn aside the evil of your doings, from before Mine eyes, Cease to do evil, learn to do good.
James 4:8
8 draw nigh to God, and He will draw nigh to you; cleanse hands, ye sinners! and purify hearts, ye two-souled!