CC Ādi 16.36

śuniyā brāhmaṇa garve varṇite lāgilā
ghaṭī eke śata śloka gaṅgāra varṇilā
Word for word: 
śuniyā — hearing this; brāhmaṇa — the paṇḍita, Keśava Kāśmīrī; garve — in pride; varṇite — to describe; lāgilā — began; ghaṭī — hour; eke — one; śata — hundred; śloka — verses; gaṅgāra — of the Ganges; varṇilā — described.
Translation: 
When the brāhmaṇa, Keśava Kāśmīrī, heard this, he became still more puffed up, and within one hour he composed one hundred verses describing mother Ganges.