 कुबेरेणस्वयंस्वप्नेयद्दत्तममितात्मना ।।दुर्जयंदुर्विषह्यं च सेन्द्रैरपिसुरासुरैः । 
 That arrow was gifted to Lakshmana in dream by Kubera, the god of wealth and even Suras or Asuras cannot resist it and is difficult to win. 