Mahabharata 3.258.13

पितरं स समुत्सृज्य पितामहमुपस्थितःतस्य कोपात्पिता राजन्ससर्जात्मानमात्मना

pitaraṃ sa samutsṛjya pitāmahamupasthitaḥtasya kopātpitā rājansasarjātmānamātmanā

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