Deu 23:10-13 If there be among you any man, that is not clean by reason of uncleanness that chanceth him by night, then shall he go abroad out of the camp, he shall not come within the camp:
But it shall be, when evening cometh on, he shall wash [himself] with water: and when the sun is down, he shall come into the camp [again].
Thou shalt have a place also without the camp, whither thou shalt go forth abroad:
For the L-RD thy G-d walketh in the midst of thy camp, to deliver thee, and to give up thine enemies before thee; therefore shall thy camp be holy: that he see no unclean thing in thee, and turn away from thee.
Mar 7:18-20 And he saith unto them, Are ye so without understanding also? Do ye not perceive, that whatsoever thing from without entereth into the man, [it] cannot defile him;
Because it entereth not into his heart, but into the belly, and goeth out into the draught, purging all meats?
And he said, That which cometh out of the man, that defileth the man.