महाभारत - उद्योग - सज्जन सङ्ग

प्रज्ञावृद्धं धर्मवृद्धं स्वबंधुं
    विद्यावृद्धं वयसा चापि वृद्धं |
कार्याकार्ये पूजयित्वा प्रसाद्य
    यः संपृच्छेन्न स मुह्येत् कदाचित् ||

- महाभारत, उद्योग

There are five kinds of people who one must listen to and respect - knowledgeable people, pious people, close friends, well educated people and the elderly. Such a person will never tread along wrong path due to ignorance.

- Mahabharatha, Udyoga