'Monthly' in the Bible

"Speak to the children of Israel, saying, 'If a woman conceives, and bears a male child, then she shall be unclean seven days; as in the days of her monthly period she shall be unclean.

"'If any man lies with her, and her monthly flow is on him, he shall be unclean seven days; and every bed whereon he lies shall be unclean.

"'If a man lies with a woman having her monthly period, and uncovers her nakedness; he has made naked her fountain, and she has uncovered the fountain of her blood: and both of them shall be cut off from among their people.