The great Rși Agastya first conferred this upon him. This is a huge and dreadful shaft given by Brahma and highly useful in battle.
यं तस्मै प्रथमं प्रादादगस्त्यो भगवानृषिः। ब्रह्मदत्तं महद्वाणममोघं युधि वीर्यवान्॥