Valmiki Ramayana Aranya Kanda Sarga 14 Shloka 31
Original Shlokaकद्रूर्नागं सहस्रास्यं विजज्ञे धरणीधरम्। द्वौ पुत्रौ विनतायास्तु गरुडोऽरुण एव च।।3.14.31।।
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कद्रूः Kadhruva, सहस्रास्यम् thousandheaded, धरणीधरम् he which held the whole earth, नागम् serpent, विजज्ञे produced, विनतायास्तु of Vinata too, गरुडः Garuda, अरुण Aruna, एव च द्वौ two, पुत्रौ sons.
Kadhru produced a thousandhooded serpent(Adisesha) who held the whole earth on his head and Vinata, two sons, Garuda and Aruna.