Jahnu (Sanskrit: जह्नु) is a hermit-king in Hinduism, belonging to the Chandravamsha dynasty.
O brahmins, on seeing the sacrificial chamber thus flooded all round king Jahnu became infuriated.
He said to Gaṅgā—O Gaṅgā, ere long, reap the fruits of this arrogance of thine.
I shall condense your water flourishing in the three worlds and drink it up.As prophesied, Jahnu appears in the legend of Ganga and Bhagiratha.
When the goddess Ganga descended upon the earth after being released from Shiva's locks, her torrential waters wreaked havoc upon Jahnu's fields and penance.