釋氏要覽 2.33

2.33

五分律云。有常住比丘。不禮來去比丘。來去比丘不禮常住比丘。有比丘到一寺不禮久住比丘。久住比丘問汝從何來。當知汝彼處比丘。皆如是憍慢。以此白佛。佛言應遍禮。不禮者得突吉羅罪。

The Five-Part Vinaya says: There were resident monks who did not bow to visiting monks, and visiting monks who did not bow to resident monks. A monk arrived at a monastery and did not bow to the long-resident monks. A long-resident monk asked, "Where have you come from? We should know that the monks of your place are all arrogant like this." They reported this to the Buddha. The Buddha said, "You should bow to all. Those who do not bow commit a duṣkṛta offense."