Mahabharata 13.143.3

भीष्म उवाच · bhīṣma uvāca

एष ते केशवः सर्वमाख्यास्यति महामतिःव्युष्टिं ब्राह्मणपूजायां दृष्टव्युष्टिर्महाव्रतः

eṣa te keśavaḥ sarvamākhyāsyati mahāmatiḥvyuṣṭiṃ brāhmaṇapūjāyāṃ dṛṣṭavyuṣṭirmahāvrataḥ

Our plain-language meaning of this verse is waiting for scholar review.