The Sheng fomu xiaozi banruo boluomiduo jing; Skt Svalpa^ks!ara-prajn~a^paramita^; Tib. bcom ldan 'das ma nor rgyun ma'i rtog pa （To.22/530， P.159） Perfection of Wisdom of the Little Mother Syllables; 1 fasc. （T 257.8.852-4）， tr. Tianxizai 天息灾. （IMK53） The Buddha teaches at Grdhraku^ta in response to the questions by Avalokite/svara.