Bg 18.42

śamo damas tapaḥ śaucaṁ
kṣāntir ārjavam eva ca
jñānaṁ vijñānam āstikyaṁ
brahma-karma svabhāva-jam
Word for word: 
śamaḥ — peacefulness; damaḥ — self-control; tapaḥ — austerity; śaucam — purity; kṣāntiḥ — tolerance; ārjavam — honesty; eva — certainly; ca — and; jñānam — knowledge; vijñānam — wisdom; āstikyam — religiousness; brahma — of a brāhmaṇa; karma — duty; svabhāva-jam — born of his own nature.
Translation: 
Peacefulness, self-control, austerity, purity, tolerance, honesty, knowledge, wisdom and religiousness – these are the natural qualities by which the brāhmaṇas work.