Valmiki Ramayana Ayodhya Kanda Sarga 85 Shloka 17
Original Shlokaअन्तर्दाहेन दहनस्सन्तापयति राघवम्। वनदाहाभिसन्तप्तं गूढोऽग्निरिव पादपम्।।2.85.17।।
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वनदाहाभिसन्तप्तं dried by forest fire, पादपं tree, गूढः hidden, अग्निरिव like a fire, राघवम् Bharata, दहनः grief, अन्तर्दाहेन burning within himself, सन्तापयति scorching.
Just like a concealed forestfire scorching the dried up forest, the fire of sorrow kindled in his mind scorched Bharata.