Bhishma said As the duty of the Brahmanas is to practise charity, to study, and perform penances, so the duty of Kshatriyas is to renounce their bodies, OKrishna, in battle.
भीष्म उवाच ब्राह्मणानां यथा धर्मो दानमध्ययनं तपः। क्षत्रियाणां तथा कृष्ण समरे देहपातनम्॥