Padma Purana 5.30.19

Padmapurāṇa 5.30.19

ṛtaṃbharauvāca
svāminvaṃdhyasyamebrūhiputrotpattikaraṃvacaḥ
yatkṛtvājāyate'patyaṃmamavaṃśadharaṃvaram