Madhu and Kaitava, stole all the Vedic knowledge from Lord Brahma so that Lord Narayana had to teach it to Brahma again. He did so within 5 nights only.
In panchratrik Samhitas and Tantras Vaishnavas philosophy are well explained by Sages and according to the Pancharatra Agamas the Maharishis — Shandilya, Aupagayan, Manujyayan, Kaushik and Bhardvaj are Rishis who propogated various panchratra branches.
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