The Kshatriya, O Keshava, knows his own duty who kills in battle his very preceptors, if they happen to be sinful and covetous and negligent of restraints and vows.
समयत्यागिनो लुब्धान् गुरूनपि च केशव। निहन्ति समरे पापान् क्षत्रियो यः स धर्मवित्॥