釋氏要覽 1.441

1.441

律云。有長者。先世壓油為業。請善法比丘齋。有小不愜。便諷云食味甚好。唯少胡麻滓。既觸諱長者遂不悅。佛於是制戒（凡赴請。必先問賓宅中所諱）僧祇律云。齋家。慎勿喧笑。及交頭雜說。妄談世事○法苑云。今見哀孝之家比丘筵上。放情語笑談說世事。實為俗嗤仁者宜忌之。

The Vinaya says: "There was an elder whose family had worked in oil-pressing for generations. He invited the monk Shanfa to a meal. Being slightly dissatisfied, [the monk] dropped a hint, saying: 'The taste of the food is very good, only the sesame dregs are lacking.' Having touched upon what was taboo, the elder was displeased. The Buddha thereupon formulated a precept." (Whenever attending an invitation, one must first inquire about what is taboo in the host's household.) The Mahāsāṃghika-vinaya says: "At the house offering a meal, take care not to laugh loudly, talk together in whispers, or rashly converse on worldly matters." The Fayuan [zhulin] says: "Nowadays one sees monks at the banquets of households in mourning laughing and talking freely, conversing on worldly affairs; this is truly ridiculed by the vulgar, and humane persons should avoid it."