Compiled by Imam Yahya ibn Sharaf al-Nawawi
وعن أنس رضي الله عنه قال: قال رسول الله صلى الله عليه وسلم : "ما أكرم شاب شيخًا لسنه إلى قيض الله له من يكرمه عند سنه" ((رواه الترمذي وقال: حديث غريب)).
Messenger of Allah (ﷺ) said, "If a young man honours an older person on account of his age, Allah appoints someone to show reverence to him in his old age"[At-Tirmidhi, who classified it as Hadith Gharib].