One verse

Srimad Bhagavatam 1.3.22

1.3.22

नरदेवत्वमापन्न: सुरकार्यचिकीर्षया । समुद्रनिग्रहादीनि चक्रे वीर्याण्यत: परम् ॥ २२ ॥

nara-devatvam apannah sura-karya-cikirsaya samudra-nigrahadini cakre viryany atah param

nara
human being
devatvam
divinity
apannah
having assumed the form of
sura
the demigods
karya
activities
cikirsaya
for the purpose of performing
samudra
the Indian Ocean
nigraha-adini
controlling, etc.
cakre
did perform
viryani
superhuman prowess
atah param
thereafter.

In the eighteenth incarnation, the Lord appeared as King Rama. In order to perform some pleasing work for the demigods, He exhibited superhuman powers by controlling the Indian Ocean and then killing the atheist King Ravana, who was on the other side of the sea.