Leviticus 5:3

Either when he toucheth any uncleanness of man - whatsoever uncleanness it be that a man is defiled withal - and is not ware of it and afterward cometh to the knowledge of it, he is a trespasser.

Leviticus 12:1-8

And the LORD spake unto Moses, and said,

Leviticus 15:1-33

And the LORD spake unto Moses and Aaron,

Numbers 19:11-16

"'He that toucheth any dead person, shall be unclean seven days.

Leviticus 22:4-6

None of the seed of Aaron that is a leper or that hath a running sore, shall eat of the hallowed things until he be clean. And whosoever toucheth any unclean soul or man whose seed runneth from him by night,

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