عن أنس بن مالك قال: قال رسول الله صلى الله عليه وسلم: ما أكرم شاب شيخا لسنه إلا قيض الله له من يكرمه عند سنه (سنن الترمذي، الرقم: 2022)

Hazrat Anas bin Maalik (radhiyallahu ‘anhu) reports that Rasulullah (sallallahu ‘alaihi wasallam) said, “Whichever young person honors (and serves) an old person, on account of his advanced age, then Allah Ta‘ala will cause people to honor (and serve) him when he reaches old age.”