Srimad-Bhagavatam: Canto 9 - Chapter 1 - Verse 13
Sanskrit:
योऽसौ गङ्गातटे क्रीडन् मञ्जूषान्तर्गतं शिशुम् ।कुन्त्यापविद्धं कानीनमनपत्योऽकरोत् सुतम् ॥ १३ ॥
ITRANS:
yo ’sau gaṅgā-taṭe krīḍanmañjūṣāntargataṁ śiśumkuntyāpaviddhaṁ kānīnamanapatyo ’karot sutam
Translation:
While playing on the bank of the Ganges, Adhiratha found a baby wrapped up in a basket. The baby had been left by Kuntī because he was born before she was married. Because Adhiratha had no sons, he raised this baby as his own. [This son was later known as Karṇa.]