Mahabharata 13.113.17
अवाप्य प्राणसंदेहं कार्कश्येन समार्जितम्अन्नं दत्त्वा द्विजातिभ्यः शूद्रः पापात्प्रमुच्यते
avāpya prāṇasaṃdehaṃ kārkaśyena samārjitamannaṃ dattvā dvijātibhyaḥ śūdraḥ pāpātpramucyate
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book