Matinara performed the most efficacious twelve years' sacrifice on the banks of the Sarasvati. At the conclusion of the sacrifice, the Sarasvati herself appeared before him and chose him as her husband. He begot on her a son, named Tansu.
मतिनारः खलु सरस्वत्यां गुणसमन्वितं द्वादशवार्षिकं सत्रमाहरत्। समाप्ते च सत्रे सरस्वत्यभिगम्य तं भर्तारं वरयामास। तस्यां पुत्रमजीजनत् तंसुं नाम॥