法苑珠林 17.70

17.70

又大般若經（第四百四十卷云）佛言。諸善男子善女人等。書寫般若波羅蜜多甚深經時。頻申欠呿無端戲笑。互相輕𣣋身心躁擾。文句倒錯。迷惑義理。不得滋味。橫事欻起書寫不終。當知是為菩薩魔事。

Furthermore, the Pañcaviṃśatisāhasrikā Prajñāpāramitā Sūtra (in fascicle 440) says: The Buddha said: "When all good men, good women, and others copy the profound Prajñāpāramitā Sūtra, if they stretch, yawn, laugh frivolously without reason, look down upon each other, are agitated in body and mind, make sentences inverted and erroneous, are confused about the doctrine and principles, fail to obtain its savor, and untoward disruptions suddenly arise so that copying is not completed, you should know that these are the demonic affairs of a bodhisattva."