Valmiki Ramayana Yuddha Kanda Sarga 28 Shloka 14
Original Shlokaअनाधृष्यतमंदेवमपिदेवर्षिदानवैः । अनासाघैवपतितोभास्करोदयनेगिरौ ।।6.28.14।।
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देवर्षिदानवैरपि even for gods, sages and Danavas, अनाधृष्यतमम् unassailable, देवम् Sun god god, अनासाद्येव not possible, भास्करोदयने near the eastern part, गिरौ on the mountain, पतिता fell down.
"Unassailable even for gods, sages and Danavas to reach the Sun god, he fell down near the eastern part."