四分律比丘含注戒本 2.808

2.808

The Buddha was among the Śākyas. Nanda was shorter than the Buddha by four fingerbreadths. When the bhikṣus saw him from afar, they thought he was the Buddha and went out to welcome him; only upon reaching him did they know he was not, and each felt ashamed. The Buddha ordained that Nanda wear dark-colored robes. The group-of-six made robes equal in measure to the Buddha's or exceeding the measure. The bhikṣus reported the fault, and the Buddha thereupon formulated the precept.