Mahabharata 3.281.56

चतुर्वर्षशतं चायुस्त्वया सार्धमवाप्स्यतिइष्ट्वा यज्ञैश्च धर्मेण ख्यातिं लोके गमिष्यति

caturvarṣaśataṃ cāyustvayā sārdhamavāpsyatiiṣṭvā yajñaiśca dharmeṇa khyātiṃ loke gamiṣyati

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