 अवश्यं रक्षणं कार्यमदृष्टे विजने वने।अग्रतो गच्छ सौमित्रे सीता त्वामनुगच्छतु।।। 
  In this desolate forest which we had never seen before we must certainly be concerned about our protection. O Lakshmana , let Sita follow you  