四分律比丘含注戒本 2.537

2.537

彼於露地，若草木、枝葉、紵麻、芻摩，若牛屎、糠、糞、𭚢中，一切然者，波逸提。若火置草木乃至𭚢中，亦墮。若被燒半焦，擲著火中，及然炭者，突吉羅。若不語前人「知是，看是」，亦吉羅。不犯者：語言「知是，看是」；若病人自然，教人然；有時因緣，看病人煮糜粥羹飯；若在厨屋中、浴室中；熏鉢，煮染，然燈，燒香——一切無犯。

If in the open ground he kindles grass, wood, twigs, leaves, hemp, linen, cow dung, chaff, manure, or refuse, in all cases it is a prāyaścittika. If he places fire amidst grass and wood, down to refuse, it is also a prāyaścittika. If an object is half-burned and he throws it into the fire, or kindles charcoal, it is a duṣkṛta. If he does not say to the person before him, "Know this, watch this," it is also a duṣkṛta. There is no offence: if he says, "Know this, watch this"; if a sick person kindles it himself or instructs another to kindle it; if there are proper circumstances of time, such as tending a sick person by cooking gruel, porridge, soup, or rice; if it is in a kitchen or a bathhouse; or if it is for fumigating a bowl, boiling dye, lighting a lamp, or burning incense—in all such cases there is no offence.