'Unclean' in the Bible

So then, be careful and do not drink wine or strong drink, and do not eat anything unclean,

And he said to me, 'Look, you [will] conceive and bear a son, so then, do not drink wine or strong drink, and do not eat anything unclean, for the boy will be a Nazirite of God from birth until the day of his death.'"

She should not eat of anything that comes from the vine, or drink wine or strong drink, or eat anything unclean; she should keep all that I commanded."