Lord Rama is 7th incarnation of Lord Vishnu. During Sita's Swayamvar, Lord Rama lifts the Pinaka - the divine bow of Lord Shiva as per the contest conditions. Lord Rama tried to tie the string of Pinaka and use it but in the process broke it. Sage Parashurama comes to the place once he notices the same. Parashurama challenges Lord Rama to hold Sharanga if he could. Lord Rama lifts it easily. In some versions, it is also said that Parashurama loses his power, obtained as incarnation of Lord Vishnu, to Lord Rama as he hands over Sharanga to Lord Rama. It is also said that Lord Rama appeared as Lord Vishnu for Parashurama after holding Sharanga. Parashurama immediately blessed Lord Rama and suggested him to use Sharanga as his bow throughout his life. Lord Rama politely obeyed Parashurama's words. Lord Rama fought many battles with this celestial and divine bow only. The fierce Rama-Ravana battle was also fought with Lord Rama having Sharanga. Lord Rama killed many mighty warriors like Ravana, Kumbhakarna using this Sharanga. At the time of Ascension; Lord Rama gave this to God Varuna, the lord of the hydrosphere.