Mahabharata 13.106.42
भीष्म उवाच · bhīṣma uvāca
इत्युक्तवन्तं तं ब्रह्मा राजानं स्म भगीरथम्पूजयामास पूजार्हं विधिदृष्टेन कर्मणा
ityuktavantaṃ taṃ brahmā rājānaṃ sma bhagīrathampūjayāmāsa pūjārhaṃ vidhidṛṣṭena karmaṇā
Our plain-language meaning of this verse is waiting for scholar review.