Mbh 1.66.2a

“Vaisampayana said, ‘It is known that the spiritual sons of Brahman were the six great Rishis (already mentioned). There was another of the name of Sthanu. And the sons of Sthanu, gifted with great energy, were, it is known, eleven. They were Mrigavayadha, Sarpa, Niriti of great fame: Ajaikapat, Ahivradhna, and Pinaki, the oppressor of foes; Dahana and Iswara, and Kapali of great splendour; and Sthanu, and the illustrious Bharga. These are called the eleven Rudras. It hath been already said, that Marichi, Angiras. Atri, Pulastya, Pulaha, and Kratu--these six great Rishis of great energy--are the sons of Brahman. It is well-known in the world that Angiras’s sons are three,--Vrihaspati, Utathya, and Samvarta, all of rigid vows. And, O king, it is said that the sons of Atri are numerous. And, being great Rishis, they are all conversant with the Vedas, crowned with ascetic success, and of souls in perfect peace. And, O tiger among kings, the sons of Pulastya of great wisdom are Rakshasas, Monkeys, Kinnaras (half-men and half-horses), and Yakshas. And, O king, the son of Pulaha were, it is said, the Salabhas (the winged insects), the lions, the Kimpurushas (half-lions and half-men), the tigers, bears, and wolves. And the sons of Kratu, sacred as sacrifices, are the companions of Surya, (the Valikhilyas), known in three worlds and devoted to truth and vows. And, O protector of the Earth, the illustrious Rishi Daksha, of soul in complete peace, and of great asceticism, sprung from the right toe of Brahman. And from the left toe of Brahman sprang the wife of the high-souled Daksha. And the Muni begat upon her fifty daughters; and all those daughters were of faultless features and limbs and of eyes like lotus-petals. And the lord Daksha, not having any sons, made those daughters his Putrikas (so that their sons might belong both to himself and to their husbands).