Skandapurana 7.20.122

7.20.122

amarāvatīṃ vijitavatoḥ sundanisundayorvindhyācale nivasanam . tayoḥ saṃhārāya devānāṃ tilottamāsarjanam . tāṃ prati śivasyānugrahaḥ, maṇḍaleśvarasamākhyā . piṇḍāreśvarotpattiḥ, tilottamāyā vindhyācale gamanam . sunda- nisundayostilottamādarśanam . tilottamārthaṃ kalahāyamānayoḥ kāmasamūḍhacetasoḥ sundanindayoḥ parasparagadāprahāreṇa nidhanam . sundanisundayormṛtayorjīvataḥ śuṃbhaniśuṃbhotpattiḥ . tayostapaścarmā, varaprāptiḥ, devadānavasaṃgaraḥ, śuṃbha- niśuṃbhayorvijayaśrīprāptiḥ, devānāmantardhānam .

The dwelling on Mount Vindhya of Sunda and Upasunda after conquering Amarāvatī. The gods' creation of Tilottamā for their destruction. Śiva's grace toward her, [and] the appellation Maṇḍaleśvara. The origin of Piṇḍāreśvara; Tilottamā's journey to Mount Vindhya. Sunda and Upasunda's seeing of Tilottamā. The death of Sunda and Upasunda, whose minds were bewildered by desire, by striking each other with maces while fighting over Tilottamā. The birth of Śumbha and Niśumbha while the dead Sunda and Upasunda were yet alive. Their practice of austerities, attainment of boons, the battle between the gods and the Dānavas, Śumbha and Niśumbha's attainment of the splendor of victory, [and] the disappearance of the gods.