四分律行事鈔資持記 1.574

1.574

棄捨失中。必約作意捨去，後更不還，無一人住，方名失界。疏云：雖非作法，僧義絕故；又引《文殊問經》云：下至有一優婆塞宿，是名不失。文中，前引《十誦》。明須作念，故知不作則不失也。《智論》。限定一宿，故知未宿還來，亦不失也。

In [the section on] loss through abandonment: It must be that one deliberately abandons it and departs, never to return later, with not a single person dwelling there, before it is called losing the boundary. The Commentary states: "Although it is not [by] a ritual action, the principle of the Saṃgha has been severed." It also cites the Sūtra of Mañjuśrī's Questions: "Down to having even one upāsaka staying overnight, it is called not lost." In the text, it first cites the Daśādhyāya-vinaya, clarifying that one must formulate the thought; thus we know that if one does not formulate it, it is not lost. The Mahāprajñāpāramitopadeśa limits it to one overnight stay; thus we know that if one returns before staying overnight, it is also not lost.