四分律行事鈔資持記 2.2110

2.2110

四中。各壞二法者，且如本犯漏失，行百日別住；已行一月，復犯前戒；還依百日治之，故云本日也；六夜亦爾，已行五夜，再犯本罪，重行六夜。然本日治法，無別羯磨，但是再加覆藏六夜二法。如別述者，即《隨機羯磨》及疏中。

In the fourth: "each vitiates two dharmas": for instance, if one originally committed an emission offense and was practicing a hundred days of parivāsa, and having already practiced for one month, one commits the former precept again; one is punished again on the basis of the hundred days, hence it is called "original days" (mūlaparivāsa); the six nights are also like this: having already practiced five nights, one commits the root offense again and must practice the six nights anew. However, the disciplinary procedure of the original days has no separate karmavācanā; it merely adds again the two dharmas of concealment and the six nights. "As explained elsewhere" refers to the Manual of Occasional Karmavācanā (Suiji jiemo) and its commentary.