Thereafter Sūta Gosvāmī, in response to questions from Śrī Śaunaka, described the divisions of the Vedas. From the heart of the topmost demigod, Brahmā, came the subtle transcendental vibration, and from this subtle sound vibration arose the syllable om, greatly potent and self-luminous. Using this oṁkāra, Lord Brahmā created the original Vedas and taught them to his sons, Marīci and others, who were all saintly leaders of the brāhmaṇa community. This body of Vedic knowledge was handed down through the disciplic succession of spiritual masters until the end of Dvāpara-yuga, when Lord Vyāsadeva divided it into four parts and instructed various schools of sages in these four saṁhitās. When the sage Yājñavalkya was rejected by his spiritual master, he had to give up all the Vedic mantras he had received from him. To obtain new mantras of the Yajur Veda, Yājñavalkya worshiped the Supreme Lord in the form of the sun-god. Śrī Sūryadeva subsequently fulfilled his prayer.