'Impurity' in the Bible

Speak unto the children of Israel, saying, If a woman conceive seed, and bear a man-child, then she shall be unclean seven days; as in the days of the impurity of her sickness shall she be unclean.

But if she bear a maid-child, then she shall be unclean two weeks, as in her impurity; and she shall continue in the blood of her purifying threescore and six days.

And if a woman have an issue, and her issue in her flesh be blood, she shall be in her impurity seven days: and whosoever toucheth her shall be unclean until the even.

And everything that she lieth upon in her impurity shall be unclean: everything also that she sitteth upon shall be unclean.

And if any man lie with her, and her impurity be upon him, he shall be unclean seven days; and every bed whereon he lieth shall be unclean.

And if a woman have an issue of her blood many days not in the time of her impurity, or if she have an issue beyond the time of her impurity; all the days of the issue of her uncleanness she shall be as in the days of her impurity: she is unclean.

Every bed whereon she lieth all the days of her issue shall be unto her as the bed of her impurity: and everything whereon she sitteth shall be unclean, as the uncleanness of her impurity.

and of her that is sick with her impurity, and of him that hath an issue, of the man, and of the woman, and of him that lieth with her that is unclean.

And if a man shall take his brother's wife, it is impurity: he hath uncovered his brother's nakedness; they shall be childless.