رِيَاضُ الصَّالِحِينَ
Riyad as-Salihin 359
The Book of Miscellany
Revering the Scholars and Elders, Preferring them to others and raising their Status
وَعَنْ أَنَسٍ رَضِيَ اللَّهُ عَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ : مَا أَكْرَمَ شَابٌّ شَيْخًا لِسِنِّهِ إلى قَيَّضَ اللَّهُ لَهُ مَنْ يُكْرِمُهُ عِنْدَ سِنِّهِ ((رَوَاهُ التِّرْمِذِيُّ وَقَالَ: حَدِيثٌ غَرِيبٌ)).
Anas bin Malik (May Allah be pleased with him) reported: 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].
Riyad as-Salihin, 359