Matsyapurana 140.74

140.74

sahasraśṛṅgair bhavanair yadāsīt sahasraśṛṅgaḥ sa ivācaleśaḥ
nāmāvaśeṣaṃ tripuraṃ prajajñe hutāśanāhārabaliprayuktam //

There was a tremendous noise when the gates, the compound wall and the various buildings inside Tripura, tumbled into the ocean with great violence That Tripura was majestic like the mountain with thousands of peaks The very same Tripura with all its habitations became the morsel of fire and remained only in name—73 74