Abhiwadansheelasya nityam vruddhopasevinah

Chatwari tasya vardhyante aayurvidya yasho balam

अभिवादनशीलस्य नित्यं वृद्धोपसेविनः

चत्वारि तस्य वर्धन्ते आयुर्विद्या यशो बलम

Person who habitually salutes and provides the services to the elder people. He is blessed with the growth in age, knowledge, fame and strength.

The Indian ancient wisdom as well as family system has always put in center, the service and respectful behavior towards elder people. This verse clearly mentions that one who does service and respect to the elder people; will automatically enjoy the benefit of healthy and long living, knowledge, fame and strength.