This term refers both to the dwellings and communal structures like a meditation hall at a monastic site. More literally “shelter for exertion”, Kalyāṇamitra describes this as a “place for the cultivation of samādhi” (F.309.a: spong khang zhes bya ba ni bsam gtan sgom pa’i gnas so). Asaṅga’s Abhidharma­samuccaya uses the Skt. prahāṇa (Tib. spong ba) as “meditation” in the phrase samyakprahāṇa; Tib. yang dag par spong ba. On the Pāli correlate, padhāna, see Paravahera Vajirañāṇa Mahāthera 2022, p. 22.