Brihat Samhita
आनर्तऽर्बुदपुष्करसौराष्ट्रऽभीरशूद्ररैवतकाः । नष्टा यस्मिन्देशे सरस्वती पश्चिमो देशः । १६-३० ॥
The Anarta, Arbuda, Pushkara, and Saurashtra regions, inhabited by Abhiras, Shudras, and Raivatakas, have been lost in that land where the Sarasvati flows in the western region.
english translation
Anarta'rbudapuSkarasaurASTra'bhIrazUdraraivatakAH । naSTA yasmindeze sarasvatI pazcimo dezaH । 16-30 ॥
hk transliteration by Sanscript