Valmiki Ramayana Sundara Kanda Sarga 1 Shloka 76
Original Shlokaदशयोजनविस्तीर्णा त्रिंशद्योजनमायता। छाया वानरसिंहस्य जले चारुतराभवत्।।5.1.76।।
1 source checked for this shloka
दशयोजनविस्तीर्णा spread over ten yojanas in breadth, त्रिंशद्योजनम् thirty yojanas, आयता long, वानरसिंहस्य of the lion among monkeys, छाया shadow, जले in water, चारुतरा more pleasing, अभवत् looked.
The shadow of Hanuman, the lion among monkeys, thirty yojanas long and ten yojanas in breadth appeared more pleasing৷৷