Mahabharata 5.147.13

एवं ज्येष्ठोऽप्यथोत्सिक्तो न राज्यमभिजायतेयवीयांसोऽभिजायन्ते राज्यं वृद्धोपसेवया

evaṃ jyeṣṭho'pyathotsikto na rājyamabhijāyateyavīyāṃso'bhijāyante rājyaṃ vṛddhopasevayā

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