Valmiki Ramayana Aranya Kanda Sarga 24 Shloka 12
Original Shlokaतस्माद्गृहीत्वा वैदेहीं शरपाणिर्धनुर्धरः। गुहामाश्रय शैलस्य दुर्गां पादपसङ्कुलाम्।।3.24.12।।
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तस्मात् therefore, वैदेहीम् to Sita, गृहीत्वा taking, शरपाणिः with arrows in hand, धनुर्धरः wielding bow, शैलस्य mountains, दुर्गाम् inaccessible, पादपसङ्कुलाम् crowded with trees, गुहाम् cave, आश्रय take shelter.
Therefore, take shelter along with Sita in the inaccessible mountain cave, overgrown with trees, ready with your bow and arrows.