tasmai-thereupon; idam-this; bhagavatam-the glories of the Lord or the science of the Lord; puranam-Vedic supplementary; dasa-laksanam-ten characteristics; proktam-described; bhagavata-by the Personality of Godhead; praha-said; pritah-in satisfaction; putraya-unto the son; bhuta-krt-the creator of the universe.