Manava Dharmashastra 3.188

3.188

havirbhuja eva haviṣmantaḥ | kavirbhṛguḥ | 'kāvyaṃ vadantyuśanasamiti' smaranti bhārgavam | yathaitā devatā ṛṣīṇāṃ putrā evaṃ tvadīyāścāpi pitaro devatārūpā eveti mā'vamaṃsthāḥ |

Somapas are the sons of Kavi; Haviṣmats are the sons of Aṅgiras; Ājyapās are the sons of Pulastya, and Sukālins, of Vaśiṣṭha.—(198)

Medhātithi’s commentary (manubhāṣya):
The Havirbhujs are here spoken of as ‘Haviṣmats.’

‘Kavi’ is Bhrgu. They say that ‘Uśanas is called Kāvya, as also Bhārgava.’

‘Just as these gods are the sons of sages, so your Pitṛs also are god-like in their nature; hence you should not disregard them,’—[such is the purport of these verses].—(198)