Mahabharata 13.55.30

भविष्यत्येष ते कामः कुशिकात्कौशिको द्विजःतृतीयं पुरुषं प्राप्य ब्राह्मणत्वं गमिष्यति

bhaviṣyatyeṣa te kāmaḥ kuśikātkauśiko dvijaḥtṛtīyaṃ puruṣaṃ prāpya brāhmaṇatvaṃ gamiṣyati

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