法苑珠林 49.10

49.10

又地獄經云。為人弟子說師僧過者。設師有實命終必入地獄噉其舌根。若得好食美菓等。不與父母師僧先自食噉。墮餓鬼中。後生為人貧窮。若人含毒向師長入鐵杙地獄。後生毒蛇中。若惡心學父母師長語入融銅地獄。後生為人謇吃。

Moreover, the Hell Sūtra says: 'If a disciple speaks of the faults of their master or monks, even if the master truly has them, at the end of life that disciple will surely enter hell and have their tongue eaten away. If one obtains good food, delicious fruit, and the like, and does not give it first to parents, masters, or monks, but eats it oneself, one falls among the hungry ghosts, and afterward is born among humans in poverty. If a person harbors venom toward their masters or elders, they enter the Iron Stake Hell, and afterward are born among venomous snakes. If with an evil mind one mimics the speech of parents, masters, or elders, one enters the Molten Copper Hell, and afterward is born among humans with a stammer.'