दुर्मद-कुरण्ड-वधः (The Slaying of Durmada and Kuraṇḍa) — Lalitopākhyāna Battle Continuation
सौराष्ट्रं च विषं घोरं ब्रह्मपुत्रमथापरम् / प्रतिपन्नं शौक्लिकेयमन्यान्यपि विषाणि च
saurāṣṭraṃ ca viṣaṃ ghoraṃ brahmaputramathāparam / pratipannaṃ śauklikeyamanyānyapi viṣāṇi ca
There was the dreadful poison called Saurāṣṭra, and also Brahmaputra; then arose Śauklikeya, and other poisons as well.