Skandapurana 6.3.56.42

6.3.56.42

vīkṣyate jāhnavī puṇyā devairutpāditā purā .
snātvā tatra jalaṃ dadyāttilamiśraṃ narādhipa .. 56.42 ..

There is seen the holy Jāhnavī, brought forth by the gods in ancient times.
Having bathed there, one should offer water mixed with sesame seeds, O ruler of men.