Mahabharata 12.273.21

तामुवाच महाबाहो ब्रह्महत्यां पितामहःस्वरेण मधुरेणाथ सान्त्वयन्निव भारत

tāmuvāca mahābāho brahmahatyāṃ pitāmahaḥsvareṇa madhureṇātha sāntvayanniva bhārata

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