佛說佛名經 18.27

18.27

"The horse-headed rākṣasa replied, 'These śramaṇas received the pure precepts of the Buddha but did not guard their deportment. Although they possessed kāṣāyas, they refused to wear them, entering villages and towns with bare and exposed bodies, just like dried withered trees devoid of luster. If they were on Buddha grounds or saṅgha grounds, it was also like this. The devas called out: "Mad thief bhikṣus have entered the people's villages!" Due to these causes and conditions, they have fallen into this hell. Emerging from this hell, they will constantly become animals throughout thousands of myriads of kalpas.'"