Bhagavad Gita 18.42

शमो दमस्तपः शौचं क्षान्तिरार्जवमेव च।ज्ञानं विज्ञानमास्तिक्यं ब्रह्मकर्म स्वभावजम्॥

śamo damastapaḥ śaucaṃ kṣāntirārjavameva ca |jñānaṃ vijñānamāstikyaṃ brahmakarma svabhāvajam ||

Serenity, self-restraint, austerity, purity, forgiveness, and uprightness, as well as knowledge, realization, and belief in God, are the duties of Brahmanas, born of their own nature.

Serenity, self-restraint, austerity, purity, forgiveness, uprightness, knowledge, wisdom, and faith in God—these constitute the duty of a spiritual teacher.

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