Skandapurana 14.36.171

14.36.171

putrahīnaśca yo martyo nārī vāpi samāhitā ..
tanmanāḥ piṃḍadānaṃ vai tathā snānaṃ kariṣyati ..
aputro labhate śīghraṃ suputraṃ nātra saṃśayaḥ .. 171 ..

And whatever sonless man or focused woman,
mindful of this, shall bathe and make an offering of the rice ball,
being sonless, will quickly obtain a good son; of this there is no doubt."