Ramayana
कामं शतं सहस्रं वा न ह्येष विधिरुच्यते । योजनानां भवान् शक्तो गन्तुं प्रतिनिवर्तितुम् ॥ ४-६५-२१
'You can go upto even a hundred thousand yojanas and have the required energy to return also. But it is not proper to send you (because you are the heir apparent). ॥ 4-65-21॥
english translation
kAmaM zataM sahasraM vA na hyeSa vidhirucyate । yojanAnAM bhavAn zakto gantuM pratinivartitum ॥ 4-65-21
hk transliteration by Sanscript