四分律刪繁補闕行事鈔 3.352

3.352

《四分》：不得賣卜誦呪，處方治病等。由事容不實，謗毀好人故；羅漢射事不中，況凡夫乎。《律》云：凡有言誓，應言：若我作是事，南無佛；若汝作是事，亦南無佛；不得雜餘地獄等。

The Dharmaguptaka Vinaya says: One must not sell divination, chant incantations, prescribe medicine to treat illnesses, and the like. Because such matters can be untruthful and thereby defame good people; if an arhat's divination can miss the mark, how much more so that of an ordinary person! The Vinaya says: Whenever one makes an oath, one should say, 'If I have done this deed, homage to the Buddha; if you have done this deed, also homage to the Buddha'; one must not mix in other things such as the hells.