Six perfections (some say five, some seven) found in the opening phrase of each sutra: (1) 'Thus' implies perfect faith; (2) ' have I heard, ' perfect hearing; (3) 'once, 'the perfect time; (4) 'the Buddha, ' the perfect lord or master; (5) 'on Mt. Gṛdhrakūṭa, ' the perfect place; (6) 'with the great assembly ofbhikṣus, ' the perfect assembly.