佛說目連問戒律中五百輕重事經 2.40

2.40

問：「夫淨，何者須淨？淨有幾事？」答：「果菜須刀手火淨，唯穀米須火淨。果已淨，子無苦。」

Question: "Regarding making things pure, what requires purification? How many matters of purification are there?"
Answer: "Fruits and vegetables require purification by blade, hand, or fire; grains require purification only by fire. Once fruit has been made pure, the seeds present no problem."