四分律刪繁補闕行事鈔 1.194

1.194

問：現相若為？依如《五分》：病人不能口說，聽現身相與清淨欲。若舉手、若舉指、搖身、搖頭、乃至舉眼，得名清淨欲。律文如此。而取欲者，須知同別之相，方得成就。若違心不同而現相者，雖取不成，終為別眾。

Question: What is meant by manifesting signs? According to the Pañcavargika Vinaya: if a sick person cannot speak orally, he is permitted to manifest physical signs to grant purity and chanda. If he raises a hand, raises a finger, moves his body, shakes his head, or even raises his eyes, it is termed chanda of purity. Such is the Vinaya text. However, the person who takes the chanda must know the marks of agreement and disagreement before it can be accomplished. If he manifests signs while mentally disagreeing, although taken, it is not accomplished, and ultimately constitutes a separate saṃgha.