Verse 10.31

पवनः पवतामस्मि रामः शस्त्रभृतामहम्। झषाणां मकरश्चास्मि स्रोतसामस्मि जाह्नवी।।10.31।।

pavanaḥ pavatām asmi rāmaḥ śhastra-bhṛitām aham jhaṣhāṇāṁ makaraśh chāsmi srotasām asmi jāhnavī

Meaning

Among the things that purify, I'm the wind. Among the warriors, I'm Rama. Among the fishes, I'm the shark. Among the streams, I'm the Ganges.

Commentary

OMG, so Jahnu, like, totally swallowed the Ganges when Bhagiratha was bringing it down from heaven. That's why they call it Jahnavi, BTW.