Matsya Purana 196.43

196.43

tryārṣeyo hi matasteṣāṃ sarveṣāṃ pravaraḥ śubhaḥ.
aṅgirāstittiriścaiva kavibhūśca mahānṛṣiḥ .. 196.43
parasparamavaivāhyā ṛṣayaḥ parikīrtitāḥ.
atha ṛkṣabharadvājau ṛṣivān mānavastathā .. 196.44

They should not also intermarry among themselves Titira, Kapibhû, Gârgya are the three Pravaras so are Aṁgirâ, Titira, Kapibhu They should not intermarry among themselves Rikṣa, Bharadvaja, Rıṣıvân, Mânava, Maittravara Rıṣı are also known as the Ârṣeya Pravaras and Aṁgirı, Bharadvaja Vrihaspatı Mittravara Rıṣı Rıṣıvâna, and Mânava also cannot intermarry among themselves—42 46