Valmiki Ramayana Sundara Kanda Sarga 51 Shloka 23
Original Shlokaलक्षितेयं मया सीता तथा शोकपरायणा। गृह्य यां नाभिजानासि पञ्चास्यामिव पन्नगीम्।।5.51.23।।
1 source checked for this shloka
तथा like that, शोकपरायणा immersed in deep sorrow, इयं सीता this Sita, मया by me, लक्षिता is seen, पञ्चास्याम् five hooded, पन्नगीमिव like a female serpent, याम् whom, गृह्य after abducting, नाभिजानासि you do not realise.
"I have seen Sita immersed in deep sorrow. You do not realise that by abducting her you are keeping a fivehooded female serpent in your house.