Mahabharata 5.80.17

अन्यत्र ब्राह्मणात्तात सर्वपापेष्ववस्थितात्गुरुर्हि सर्ववर्णानां ब्राह्मणः प्रसृताग्रभुक्

anyatra brāhmaṇāttāta sarvapāpeṣvavasthitātgururhi sarvavarṇānāṃ brāhmaṇaḥ prasṛtāgrabhuk

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