The arrow tied all the leaves together within moments. But Lord Krishna had one leaf  under his foot. The arrow then started revolving around his foot, and he asked the boy,  whom would he favour in the war. Barbareek reiterated that he would fight for the  side, which loses. Lord Krishna knew that defeat of Kauravas was inevitable, and if this  brave boy joins them, the result would be in their favour.

 The Brahmin (Lord Krishna) then wanted charity  from the boy. Barbareek promised him anything  he wished. Lord Krishna asked him to give his  head in charity. The boy was shocked, but he  maintained his promise. He requested the  Brahmin to disclose his identity. Lord Krishna  showed him his divine form.

  He explained to Barbareek that before the  battle, in order to worship the battlefield, head  of the bravest Kshatriya needs to be sacrificed.  And he considered Barbareek to be the bravest,  and hence asked for his head in charity.

  Barbareek requested that he wanted to see the  battle till its end, and his wish was granted.  Thus on the12th day of Shukla Paksha of Falgun  month, he gave his head to Lord Krishna (SHISH  DAAN). The head was placed atop a hill near the  battlefield from where; Barbareek could watch the whole battle.

  When the battle was over and Pandavas having won, they argued amongst themselves as who was responsible for victory. At this, Lord Krishna suggested that Barbareek's head had watched the whole battle, and who else would be a better judge. Barbareek's head suggested that it was Lord Krishna who was responsible for the victory, his advice, his presence; his game plan had been crucial. He could see only the Sudarshan Chakra revolving around the battlefield, which was hacking the Kaurava army to pieces and Draupadi assuming the fearful form of Mahakali Durga was drinking bowl after bowl of blood and was not allowing even one drop of blood to fall on the earth.