One verse

Srimad Bhagavatam 12.1.36

12.1.36

सौराष्ट्रावन्त्याभीराश्च शूरा अर्बुदमालवा: । व्रात्या द्विजा भविष्यन्ति शूद्रप्राया जनाधिपा: ॥ ३६ ॥

saurāṣṭrāvanty-ābhīrāś ca śūrā arbuda-mālavāḥ vrātyā dvijā bhaviṣyanti śūdra-prāyā janādhipāḥ

śaurāṣṭra
residing in Śaurāṣṭra
avantī
in Avantī
ābhīrāḥ
and in Ābhīra
ca
and
śūrāḥ
residing in the Śūra province
arbuda-mālavāḥ
residing in Arbuda and Mālava
vrātyāḥ
deviated from all purificatory rituals
dvijāḥ
the brāhmaṇas
bhaviṣyanti
will become
śūdra-prāyāḥ
no better than śūdras
jana-adhipāḥ
the kings

At that time the brāhmaṇas of such provinces as Śaurāṣṭra, Avantī, Ābhīra, Śūra, Arbuda and Mālava will forget all their regulative principles, and the members of the royal order in these places will become no better than śūdras.