REWARD OF A YOUNG PERSON H 360 "When a young person honors an elderly person on account of his age, Allah appoints someone to honor that person when he reaches old age." R 360 Tirmidhi with a chain up to Anas who related that the Prophet, praise and peace be upon him, said this.
359- وعن أنس رضي الله عنه ، قَالَ : قَالَ رَسُول الله صلى الله عليه وآله وسلم : "مَا أكْرَمَ شَابٌّ شَيْخاً لِسِنِّهِ إلاَّ قَيَّضَ الله لَهُ مَنْ يُكْرِمُهُ عِنْدَ سِنِّه" رواه الترمذي ، وَقالَ : "حديث غريب" .