四分律比丘含注戒本 2.359

2.359

佛在羅閱祇。迦羅坐禪，乞食疲苦，食先得者。比丘於小、大食上不見，覓之，具說所由。比丘白佛，佛便訶言：「汝雖少欲，後來眾生相法而行。」因即制戒。

The Buddha was in Rājagṛha. Kāla was sitting in meditation, and weary and suffering from begging for food, he ate what he had previously obtained. The bhikṣus did not see him at the minor or major meals, sought him out, and he explained the reasons in full. The bhikṣus informed the Buddha, and the Buddha rebuked him, saying: 'Although you have few desires, future sentient beings will take this as a model to practice.' Therefore, he immediately formulated the precept.