Matsyapurana 49.24

49.24

tataḥ kāmaṃ saṃnivartya tasyānandādbṛhaspateḥ
tadretastvapatadbhūmau nivṛttaṃ śiśuko 'bhavat //

Afterwards, Bṛihaspati cast his seed on the floor which at once became a child ; seeing whom, Mamatâ said to Bṛihaspati, "I am going home, you should support [Bhara] this child [born of us two (dvâja)], O Bṛihaspati."—24-25.