HONORING THE ELDERLY H 355 "To honor an elderly Muslim who has learned the Koran by heart and has neither altered nor contradicted it by his behavior and respects a just caliph is indeed exalting Allah." R 355 Abu Daud with a chain up to Abu Musa who related that the Prophet, praise and peace be upon him, said this.
354- وعن أَبي موسى رضي الله عنه ، قَالَ : قَالَ رَسُول الله صلى الله عليه وآله وسلم : "إنَّ مِنْ إجْلالِ اللهِ تَعَالَى : إكْرَامَ ذِي الشَّيْبَةِ المُسْلِمِ ، وَحَامِلِ القُرآنِ غَيْرِ الغَالِي فِيهِ ، وَالجَافِي عَنْهُ ، وَإكْرَامَ ذِي السُّلْطَانِ المُقْسِط" حديث حسن رواه أَبُو داود .