Bhagavad Gita 18.42
शमो दमस्तपः शौचं क्षान्तिरार्जवमेव च। ज्ञानं विज्ञानमास्तिक्यं ब्रह्मकर्म स्वभावजम्।।18.42।।
śamo damastapaḥ śaucaṃ kṣāntirārjavameva ca| jñānaṃ vijñānamāstikyaṃ brahmakarma svabhāvajam||18.42||
shamo damastapah shaucam kshantirarjavameva ca jnanam vijnanamastikyam brahmakarma svabhavajam18.42
Meaning
Serenity, self-control, austerity, purity, forbearance, uprightness, knowledge, wisdom, and faith in God — these are the natural duties of the Brahmana.
शम, दम, तप, शौच, क्षान्ति, आर्जव, ज्ञान, विज्ञान और आस्तिक्य — ये ब्राह्मण के स्वाभाविक कर्म हैं।
This is verse 42 of 78 in Chapter 18 (Moksha Sannyasa Yoga) of the Bhagavad Gita.