Skanda Purana 6.1.72.45

6.1.72.45

43 ujjayinyāṃ tripurāsureṇa brahmāṇamuddiśya tapaścaraṇam, brahmaṇā tasmai varapradānam, tripurāsurapīḍitānāmindrādīnāṃ śivāgre gamanam, śivena tebhyo'bhayadānam, śivājñayendrādibhiravantyāṃ cāmuṇḍopāstikaraṇam, cāmuṇḍāvacanācchivena daityaparājayakaraṇam. tatra tripuradānavasya ujjitatvādujjayinīti nāmnā tasya purasya prasiddhivarṇanam, ujjayinīmāhātmyavarṇanam.. -.... ..... 45

43 In Ujjayinī, the demon Tripura performing austerity directed towards Brahmā; Brahmā granting a boon to him; Indra and the other gods afflicted by the demon Tripura going before Śiva; Śiva granting them safety; Indra and the others worshipping Cāmuṇḍā in Avantī by Śiva's command; Śiva defeating the Daitya at Cāmuṇḍā's word; description of the renown of that city under the name Ujjayinī because the Dānava Tripura was conquered there; description of the Ujjayinīmāhātmya ... 45