Puranic Encyclopaedia: A Comprehensive Dictionary with Special Reference to the Epic and Puranic Literature c9.1057

c9.1057

SAMJÑĀ. Wife of Sun (Sūrya).
1) Birth. Saṃjñā was the daughter of Viśvakarman according to the Viṣṇu Purāṇa (Part 3, Chapter 2) and of Tvaṣṭā according to Mahābhārata, Ādi Parva (Chapter 66, Verse 35). Most of the Purāṇas refer to Saṃjñā as the daughter of Viśvakarman.
2) Separation from husband. Saṃjñā lacked the power to put up with the heat of Sūrya. She once went into the forest to perform Tapas after deputing her companion, Chāyā, to serve her husband. Saṃjñā left her three sons Manu, Yama, and Yami also in the charge of Chāyā, who in the guise of Saṃjñā served Sūrya. He took her to his wife and begot three children, Śanaiścara, (another) Manu and Tapati of her. Chāyā once got angry and cursed Yama, son of Saṃjñā. Then it was that Sūrya realised that she was not his wife. Sūrya felt very sad at this separation from his wife and went to the forest in search of her. He knew, by the power of his meditation, that Saṃjñā was doing tapas in the guise of a mare. Then he assumed the form of a horse and begot of the mare the Aśvinikumāras and Revanta. The Aśvinikumāras named Nāsatya and Dasra, were born through the mare's (Saṃjñā) nose. (Anuśāsana Parva, Chapter 150, Verse 17).
3) Reunion. Sūrya brought Saṃjñā back with him. She complained to her father Viśvakarman, that life with Sūrya was impossible on account of his excessive heat, and so Viśvakarman ground Sūrya on his drilling machine and reduced his heat. But, only 1/8 of the heat (effulgence) could be so reduced, and it was with that fraction of effulgence that Viṣṇu's disc (cakra), Śiva's triśūla (trident), Kubera's puṣpakavimāna and Subrahmaṇya's weapon called Śakti were made. (Viṣṇu Purāṇa Part 3, Chapter 2; Harivaṃśa, Chapter 41 and Bhaviṣya Purāṇa For details see under Tapati).