Mahabharata 3.2.74

सम्यक्संकल्पसंबन्धात्सम्यक्चेन्द्रियनिग्रहात्सम्यग्व्रतविशेषाच्च सम्यक्च गुरुसेवनात्

samyaksaṃkalpasaṃbandhātsamyakcendriyanigrahātsamyagvrataviśeṣācca samyakca gurusevanāt

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