Srimad-Bhagavatam: Canto 4 - Chapter 1 - Verse 63
Sanskrit:
अग्निष्वात्ता बर्हिषद: सौम्या: पितर आज्यपा: ।साग्नयोऽनग्नयस्तेषां पत्नी दाक्षायणी स्वधा ॥ ६३ ॥
ITRANS:
agniṣvāttā barhiṣadaḥsaumyāḥ pitara ājyapāḥsāgnayo ’nagnayas teṣāṁpatnī dākṣāyaṇī svadhā
Translation:
The Agniṣvāttas, the Barhiṣadas, the Saumyas and the Ājyapas are the Pitās. They are either sāgnika or niragnika. The wife of all these Pitās is Svadhā, who is the daughter of King Dakṣa.