Mahabharata 14.26.16
अपेतव्रतकर्मा तु केवलं ब्रह्मणि श्रितःब्रह्मभूतश्चरँल्लोके ब्रह्मचारी भवत्ययम्
apetavratakarmā tu kevalaṃ brahmaṇi śritaḥbrahmabhūtaścaram̐lloke brahmacārī bhavatyayam
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book