Matsya Purana — The Cave-Sanctuary: Jewel-Lake
तृतीयं तु भुजं तस्य चतुर्थं तु तथा शृणु आत्तसंतानकुसुमं घ्राणदेशानुसर्पिणम् //
tṛtīyaṃ tu bhujaṃ tasya caturthaṃ tu tathā śṛṇu āttasaṃtānakusumaṃ ghrāṇadeśānusarpiṇam //
Now hear of the third arm of that deity-image, and likewise the fourth: it should be shown as taking the fragrant santāna flower and moving it toward the region of the nose, as though to smell it.
This verse does not discuss Pralaya; it gives a precise iconographic instruction for depicting the deity’s arms and gesture, relevant to image-construction and worship.
Indirectly, it supports dharmic duties by prescribing correct temple-image formation and devotional aesthetics—patrons (kings/householders) are expected to sponsor and maintain properly made icons for public and domestic worship.
It specifies a sculptural/ritual gesture (mudrā/bhāva): the third/fourth arm should hold a fragrant santāna flower and bring it toward the nose, guiding artisans in accurate temple iconography and devotional symbolism.