續一切經音義 4.163

4.163

俱物頭（或云拘牟頭亦云拘摩那梵音輕重也正云俱某陀此云赤蓮花亦出彼池人間希少）。

俱物頭 (Kumuda: also written 拘牟頭 or 拘摩那, varying according to the lightness or heaviness of the Sanskrit sound; properly it is kumuda; translated here as “crimson lotus flower”; it also grows in that lake and is rarely seen among humans).