Mahabharata 13.25.10

अधर्मनिरतो मूढो मिथ्या यो वै द्विजातिषुदद्यान्मर्मातिगं शोकं तं विद्याद्ब्रह्मघातिनम्

adharmanirato mūḍho mithyā yo vai dvijātiṣudadyānmarmātigaṃ śokaṃ taṃ vidyādbrahmaghātinam

Our plain-language meaning of this verse is waiting for scholar review.