'Monthly' in the Bible
She said to her father, “Sir, don’t be angry that I cannot stand up in your presence; I am having my period.” So Laban searched, but could not find the household idols.
“Speak to the children of Israel, saying,‘If a woman conceives and gives birth to a male child, she shall be [ceremonially] unclean for seven days, unclean as during her monthly period.
"When a woman has a discharge, and the blood is her monthly menstrual discharge from her body, then for seven days she is to remain in her menstrual uncleanness. Whoever touches her will remain unclean until evening.
"'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.
Their drink offerings are to be two quarts of wine with each bull, one and a third quarts with the ram, and one quart with each male lamb. This is the monthly burnt offering for all the months of the year.
These are in addition to the monthly and regular burnt offerings with their prescribed grain offerings and drink offerings. They are a pleasing aroma, a fire offering to the Lord.
But the former governors who were [in office] before me put heavy burdens on the people and took food and wine from them in addition to forty shekels of silver [as an excessive monthly salary]; even their servants assumed authority over the people. But I did not do so because of the [reverent] fear of God.
Thou art wearied in the multitude of thy counsels. Let now the astrologers, the stargazers, the monthly prognosticators, stand up, and save thee from these things that shall come upon thee.
"Son of man, when the house of Israel was living on their own land, they defiled it by their behavior and their deeds. In my sight their behavior was like the uncleanness of a woman having her monthly period.
I will put an end to all her celebration: her annual religious festivals, monthly new moon celebrations, and weekly Sabbath festivities -- all her appointed festivals.