四分律行事鈔資持記 3.860

3.860

三安置中，初科。《僧祇》好房，既是大德；《十誦》中房，計是常人；但不得下房，不容看病故。

Under Three: Lodging, the first section: In the Mahāsāṃghika-vinaya, the "good room" is because [the person] is a venerable elder; the "middle room" in the Daśādhyāya-vinaya is presumably for an ordinary person; but one cannot use an inferior room, because it does not accommodate caring for the sick.