'Unclean' in the Bible

Therefore beware, and drink no wine or strong drink, and eat nothing unclean,

but he said to me, 'Behold, you shall conceive and bear a son; so then drink no wine or strong drink, and eat nothing unclean, for the boy shall be a Nazirite to God from birth to the day of his death.'"

She may not eat of anything that comes from the vine, neither let her drink wine or strong drink, or eat any unclean thing; all that I commanded her let her observe."