Matsyapurana 49.32

49.32

pūrvaṃ tu vitathe tasmin kṛte vai putrajanmani
tatastu vitatho nāma bharadvājo nṛpo 'bhavat //

Bharadvâja was named Vitatha [futile], owing to his being futile as a son, for he never entered the mother's womb. The Brâhmaṇas and Kṣatriyas born on this Earth of Bharadvâja, came to be known as Dvyâmuṣyâyaṇa Kaulînas. When Vitatha was thus brought to Bharata, then Bharata went to heaven, and the sage Bharadvâja also went there, after anointing his son.—33-34.