Skandapurana 5.198.162

5.198.162

athaikapravaro deśo gauḍo madhupuraṃ puram ..
tataste brāhmaṇāḥ procuryasya no jñāyate kulam ..
tasya śuddhiḥ pradātavyā dhaṭadvāreṇa kevalā ..162..

and with one pravara, [my] country is Gauḍa, and [my] city is Madhupura.” / Then those brahmins said: “He whose lineage is not known, / to him purification must be granted solely by means of the balance (dhaṭa).