Lord Viṣṇu [Garbhodakaśāyī Viṣṇu] is also known as Sahasra-śīrṣā Puruṣa. From the lake of His navel sprang a lotus, on which Lord Brahmā was generated. Atri, the son of Lord Brahmā, was as qualified as his father. ।। 9-14-2 ।।
english translation
भगवान् विष्णु (गर्भोदकशायी विष्णु) सहस्रशीर्ष पुरुष भी कहलाते हैं। उनकी नाभि रूपी सरोवर से एक कमल निकला जिससे ब्रह्माजी उत्पन्न हुए। ब्रह्मा का पुत्र अत्रि अपने पिता के ही समान योग्य था। ।। ९-१४-२ ।।