Madonna, 48, first introduced the religion to the Toxic singer. Hot Stars magazine reports that Madonna is demanding the return of the 12th-century Kabbalah book she gave the star as a wedding gift.
A source told the magazine, "Madonna spent months teaching Britney the Kabbalah system, and splashed out thousands on the ancient scripture for her. She feels she has wasted time, money and precious gifts on Brit."
The 24 year-old singer, who is pregnant with baby number 2, announced that she no longer follows the ancient religion. She wrote on her official website, "I no longer study Kabbalah, my baby is my religion."