Valmiki Ramayana Kishkindha Kanda Sarga 47 Shloka 2

ते they, सरांसि tanks, सरित: कक्षान् bottom of rivers, आकाशम् sky, नगराणि च and towns, तथा similarly, नदीदुर्गान् forts surrounded by rivers, शैलान् mountains, समन्ततः every where, विचिन्वन्ति looking for.

They went looking everywhere in the tanks, in the bottom of rivers, in towns, in the sky and similarly in inaccessible rivers, mountains, and forts surrounded by rivers.