namas te vasudevaya
namah sankarsanaya ca
tubhyam bhagavate namah
namah—let me offer my respectful obeisances; te—unto You; vasudevaya—Lord Vasudeva; namah—respectful obeisances; sankarsanaya ca—also to Lord Sankarsana; pradyumnaya—to Lord Pradyumna; aniruddhaya—unto Aniruddha; tubhyam—unto You; bhagavate—unto the Supreme Personality of Godhead; namah—my respectful obeisances.
" 'I offer my respectful obeisances unto the Supreme Personality of Godhead, expanded as Vasudeva, Sankarsana, Pradyumna and Aniruddha.'
This is a prayer from Srimad-Bhagavatam (11.5.29) spoken by Karabhajana Muni when he was questioned by Maharaja Nimi, the King of Videha, about the incarnations in specific yugas and their method of worship. Karabhajana Muni was one of the nine Yogendras, and he met the King to inform him about future incarnations.
Link to this page: https://prabhupadabooks.com/cc/madhya/20/338