大比丘三千威儀 2.59

2.59

當復知十二時揵椎。常會時先從小起稍至大，大下擊二十，稍小二十一下，小小十下，復大三下。旦食大下八，晝食一通，投槃亦一通。會沙彌三下，優婆塞三下，無常者隨視時。縣官、水火、盜賊亦隨時。呼私兒一下，持一通至比丘揵椎無後音。

One should also know the striking of the ghaṇṭā for the twelve periods. For the regular assembly, first start softly and gradually grow louder: twenty loud strikes, twenty-one softer strikes, ten very soft strikes, and three loud strikes again. For the morning meal, eight loud strikes; for the midday meal, one continuous roll; for returning the basins, also one continuous roll. For assembling the śrāmaṇeras, three strikes; for upāsakas, three strikes; for an impermanence (death), adjust according to the time. For government officials, flood, fire, and bandits, also strike according to the occasion. For calling personal attendants, one strike, followed by a continuous roll until the bhikṣus' ghaṇṭā is sounded, with no following sound.