TSK
Treasury of Scripture Knowledge references in WEB.
Now Moses was keeping the flock of Jethro, his father-in-law, the priest of Midian, and he led the flock to the back of the wilderness, and came to God's mountain, to Horeb.
Now Jethro, the priest of Midian, Moses' father-in-law, heard of all that God had done for Moses, and for Israel his people, how that Yahweh had brought Israel out of Egypt.
But the man who shall be unclean, and shall not purify himself, that soul shall be cut off from the midst of the assembly, because he has defiled the sanctuary of Yahweh: the water for impurity has not been sprinkled on him; he is unclean.