O Brahmana, rendering services to the superiors, truthfulness, worthlessness and gift, these four are ever present in those, who are really virtuous.
गुरुशुश्रूषणां सत्यमक्रोधो दानमेव च। एतच्चतुष्टयं ब्रह्मन् शिष्टाचारेषु नित्यदा॥