Valmiki Ramayana Kishkindha Kanda Sarga 9 Shloka 16

अहं तु I also, तम् him, नष्टम् dead, ज्ञात्वा after knowing, स्नेहात् due to love, आगत संभ्रमः became agitated, भ्रातरम् brother, न पश्यामि I have not seen, मे my, मनः mind, पापाशङ्कि च suspected.

'Thinking him dead, I became agitated because of my love for him. My mind began to apprehend his death since I had not seen my brother for long.