'Monthly' in the Bible

“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.

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.

“You are wearied by your many counsels.Just let the astrologers,The stargazers,Those who predict by the new moons [each month]Stand up and save you from the things that will come upon you [Babylon].