佛祖統紀 46.37

46.37

In the fourth year, a fangshi said, 'The Buddha's finger-bone relic at Baguan Temple in Chenliu is merely a sea-dog's knuckle.' An edict was issued to test it. It was subjected to burning fire and iron hammers for over ten days, but its color did not change. By imperial decree, additional honors were conferred, and it was returned.