The duty of a Kshatriya is to fight and that of a Brahmana to practise severe austerities. He nas practised austerities and is skilled in the use of weapons and so he burns down by his very glance.
धर्मो युद्धं क्षत्रियस्य ब्राह्मणस्य परं तपः। तपस्वी कृतविद्यश्च प्रेक्षितेनापि निर्दहेत्॥