Valmiki Ramayana Aranya Kanda Sarga 51 Shloka 22
Original Shlokaपरिश्रान्तं तु तं दृष्टवा जरया पक्षियूथपम्। उत्पपात पुनर्हृष्टो मैथिलीं गृह्य रावणः।।3.51.22।।
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पक्षियूथपम् the lord of the flocks of birds (Jatayu), तम् him, जरया with old age, परिश्रान्तम् exhausted (after a long fight), दृष्ट्वा seeing, रावणः Ravana, हृष्टः glad, मैथिलीम् Maithili, गृह्य took, पुनः again, उत्पपात flew into the sky.
Seeing the lord of the flocks of birds exhausted due to age still fighting, Ravana felt glad. He flew back into the sky taking Sita, princess of Mithila, with him.