Mahabharata 9.6.35

न चैवात्र दया कार्या मातुलोऽयं ममेति वैक्षत्रधर्मं पुरस्कृत्य जहि मद्रजनेश्वरम्

na caivātra dayā kāryā mātulo'yaṃ mameti vaikṣatradharmaṃ puraskṛtya jahi madrajaneśvaram

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