Ekottaragama (Sanskrit fragments) 12.1.9

12.1.9

「復次，比丘！還觀此身有地種耶？水、火、風種耶？如是，比丘觀此身。復次，比丘！觀此身，分別諸界，此身有四種，猶如巧能屠牛之士、若屠牛弟子，解牛節解，而自觀見此是脚，此是心，此是節，此是頭。如是，彼比丘分別此界，而自觀察此身有地、水、火、風種。如是，比丘觀身而自娛樂。

“Furthermore, a monk returns to contemplating this body: ‘Does it possess the earth element … water … fire … air element?’ A monk contemplates the body in this way.

“Furthermore, a monk contemplates this body by discerning its elements: ‘This body has four elements.’ Like a butcher or a butcher’s apprentice cutting up a cow, he examines and sees it himself: ‘This is a leg, the heart, a joint, and the head.’ In this way, that monk discerns these elements when he examines this body: ‘The body has the earth … water … fire … air element.’ In this way, a monk contemplates the body and enjoys himself.