Mahabharata 13.131.12

तत्रासौ निरयं प्राप्तो वर्णभ्रष्टो बहिष्कृतःब्रह्मलोकपरिभ्रष्टः शूद्रः समुपजायते

tatrāsau nirayaṃ prāpto varṇabhraṣṭo bahiṣkṛtaḥbrahmalokaparibhraṣṭaḥ śūdraḥ samupajāyate

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