Mahabharata 13.80.34
येन देवाः पवित्रेण भुञ्जते लोकमुत्तमम्यत्पवित्रं पवित्राणां तद्घृतं शिरसा वहेत्
yena devāḥ pavitreṇa bhuñjate lokamuttamamyatpavitraṃ pavitrāṇāṃ tadghṛtaṃ śirasā vahet
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book