One verse

Srimad Bhagavatam 9.8.4

9.8.4

आज्ञायास्यै सपत्नीभिर्गरो दत्तोऽन्धसा सह । सह तेनैव सञ्जात: सगराख्यो महायशा: । सगरश्चक्रवर्त्यासीत् सागरो यत्सुतै: कृत: ॥ ४ ॥

ajnayasyai sapatnibhir garo datto ’ndhasa saha saha tenaiva sanjatah sagarakhyo maha-yasah sagaras cakravarty asit sagaro yat-sutaih krtah

ajnaya
knowing (this)
asyai
unto that pregnant queen
sapatnibhih
by the co-wives of the wife of Bahuka
garah
poison
dattah
was given
andhasa saha
with her food
saha tena
with that poison
eva
also
sanjatah
was born
sagara-akhyah
by the name Sagara
maha-yasah
having a great reputation
sagarah
King Sagara
cakravarti
the emperor
asit
became
sagarah
the place known as Gangasagara
yat-sutaih
by the sons of whom
krtah
was excavated

Knowing that she was pregnant, the co-wives of the wife of Bahuka conspired to give her poison with her food, but it did not act. Instead, the son was born along with the poison. Therefore he became famous as Sagara (one who is born with poiso). Sagara later became the emperor. The place known as Gangasagara was excavated by his sons.