Bhagavatapurana 9.15.8

9.15.8

sa ṛṣiḥ prārthitaḥ patnyā śvaśrvā cāpatyakāmyayā /
śrapayitvobhayairmantraiścaruṃ snātuṃ gato muniḥ //

8. Requested by the wife and also by his mother-in-law for the sake of a son, the sage prepared a charu (offering) with mantras required (severally) for both and he went out to bathe. 9. Meanwhile solicited by the mother and considering it as superior, Satyavati gave the charu meant for herself to her mother and herself swallowed what was meant for her mother.