Churching. The usage of " Churching" originated in the Jewish rite of purification. Churching is the act of returning thanks in a place of worship for any great deliverance. It was a Jewish law that a woman should keep within her house forty days after confinement, if she had a son, and eighty if she had a daughter. At the expiration of that time, she was to go to the Temple and offer a lamb with a young pigeon or turtle, or, in case of poverty, two pigeons or two turtles.