Valmiki Ramayana Aranya Kanda Sarga 54 Shloka 6

रावणः Ravana, सुसंहृष्टः delighted, आत्मनः his own, मृत्युम् death, ताम् her, तीक्ष्णदंष्ट्राम् sharp fanged, महाविषाम् highly poisonous, भुजगीम् female snake, उत्सङ्गेनेव on his lap, जहार carried.

Delighted Ravana, carried off Sita, the very embodiment of his death, like one carrying a highly poisonous sharpfanged female snake on his lap.