That weapon was begotten of Brahma energy. No person of impure soul can withdraw it after it is once discharged. Only one who leads the life of a Brahmacharin can do it.
ब्रह्मतेजोद्भवं तद्भि विसृष्टमकृतात्मना। न शक्यमावर्तयितुं ब्रह्मचारिव्रतादृते॥