'Weeks' in the Bible

"If she gives birth to a female, then she is to remain unclean for two weeks, just like her menstruation. She is to remain in purification for 66 days due to her blood loss.

"Starting the day after the Sabbath, count for yourselves seven weeks from the day you brought the sheaf of the wave offering. They are to be complete.

"Count for yourselves seven years of Sabbaths seven times seven years. This set of seven weeks of years total 49 years for you.