Mahabharata 2.61.8
न सकामाः परे कार्या धर्ममेवाचरोत्तमम्भ्रातरं धार्मिकं ज्येष्ठं नातिक्रमितुमर्हति
na sakāmāḥ pare kāryā dharmamevācarottamambhrātaraṃ dhārmikaṃ jyeṣṭhaṃ nātikramitumarhati
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book