四分律比丘含注戒本 1.524

1.524

有六種：鐵鉢、黑鉢、赤鉢、蘇摩國鉢、鳥伽羅國鉢、憂伽賒國鉢。大要有二：鐵鉢、泥鉢。大者三斗，小者一斗半，此是鉢量。如是應持，應淨施。

There are six kinds: iron bowls, black bowls, red bowls, bowls of the country of Soma, bowls of the country of Ukkala, and bowls of the country of Ujjayinī. In general there are two kinds: iron bowls and clay bowls. The large measure is three dǒu, and the small measure is one and a half dǒu; this is the capacity of a bowl. As such, they should be retained [by determination] or transferred through vikalpanā.