Skandapurana 6.3.38.64

6.3.38.64

pṛthivyāṃ yāni tīrthāni gaṅgādyāḥ saritastathā .
ekasya vipravākyasya kalāṃ nārhanti ṣoḍaśīm .. 38.64 ..

Whatever tīrthas there are on earth, and rivers such as the Gaṅgā, / are not worth a sixteenth part of a single word of a brahmin.”