"I instructed this imperishable science of yoga to the sun-god, Vivasvān, and Vivasvān instructed it to Manu, the father of mankind, and Manu in turn instructed it to Ikṣvāku." (BG 4.1) This is the method of paramparā, or disciplic succession. Similarly, Śrīmad-Bhāgavatam explains that Kṛṣṇa imparted knowledge into the heart of Brahmā, the first created being within the universe. Brahmā imparted those lessons to his disciple Nārada, and Nārada imparted that knowledge to his disciple Vyāsadeva. Vyāsadeva imparted it to Madhvācārya, and from Madhvācārya the knowledge came down to Mādhavendra Purī and then to Īśvara Purī, and from him to Caitanya Mahāprabhu.