四分律行事鈔資持記 3.933

3.933

第七，初科又三，初登廁法；應下，二洗穢法；不得下，三制餘務。初中六法：一今即去，恐生病故；二須捉草，今謂廁籌；三讓前人；四警人鬼；五教安衣；六正上廁。言著衣者，準似下衣；彼約露處，不容脫置；此多覆處，應須脫之。餘如常者，指《教誡儀》。洗穢中。留殘水者，擬他用故。一一洗者，隨用一物，取淨為期；準《鼻柰耶律》，以七土洗之，說名為淨。

In the seventh: the first section again has three parts: first, the procedure for ascending the latrine; from 'Should' down, second, the procedure for washing defilements; from 'May not' down, third, the prohibition of other activities. In the first part, there are six rules: 1. Go immediately, fearing the onset of illness; 2. Must take grass, which now refers to toilet sticks; 3. Yield to someone who came first; 4. Warn humans and spirits; 5. Instructions on placing robes; 6. Properly ascending the latrine. As for 'wearing robes', by analogy this seems to be the lower garments; that is said of an exposed place, where there is no space to take them off and put them down; here, where there is mostly cover, one must take them off. The rest as usual refers to the Etiquette for Instruction. In washing defilements: 'leaving the remaining water' is to prepare for another's use. 'Washing one by one' means following the use of each single object, taking purity as the limit; by analogy with the Vinaya of Pi-nai-ye, washing with seven kinds of earth is called pure.