四分律行事鈔資持記 2.1013

2.1013

二脫脚，律云脚入髀（疏云明將脫不久也）。三坐臥犯者，廣解唯臥犯；今從戒本，坐臥齊犯。律中若獨坐床一板床浴床，坐者皆吉。不犯者。若坐鏇脚直脚曲脚無脚床（皆謂不脫），若床支大（雖脫有所承故），若脫脚安細腰（謂有釘鈕），若重屋板覆厚覆等，若板床坐（謂以板藉），若脫脚坐（除去脚也），並開。

Second, detachable legs: the Vinaya says 'the leg inserted into the mortise' (the Commentary says: this indicates it will soon detach). Third, sitting or lying incurring an offense: the extensive explanation considers only lying down an offense; here, following the prātimokṣa, sitting and lying down equally incur an offense. In the Vinaya, sitting on a single-seat bed, a single-plank bed, or a bathing bed all incur duṣkṛtas. Non-offenses: sitting on a bed with turned legs, straight legs, curved legs, or legless beds (all meaning they do not detach); or if the bed's supports are large (even if detached, there is something supporting it); or if the detachable legs are fitted with thin waists (meaning there are pegs and fastenings); or an upper story with plank covering, thick covering, etc.; or sitting on a plank bed (meaning supported by planks); or sitting on a bed with detached legs (having removed the legs); these are all exceptions.