Valmiki Ramayana Aranya Kanda Sarga 41 Shloka 18
Original Shlokaदर्शनादेव रामस्य हतं मामवधारय। आत्मानं च हतं विद्धि हृत्वा सीतां सबान्धवम्।।3.41.18।।
1 source checked for this shloka
रामस्य Rama's, दर्शनादेव by mere sight, माम् me, हतम् a dead one, अवधारय presume, सीताम् Sita, हृत्वा abducting, सबान्धवम् along with your kith and kin, आत्मानम् yourself, हतम् killed, विद्धि understand.
Yu most understand that if I die at the very sight of Rama, you along with your relatives will perish with the abduction of Sita.