[Machine] The Prophet ﷺ honored the grave of Saad by placing his cloak on it. This information is known to me only through a narration from Yahya bin Uqbah bin Abi Al-Ayazar, who is considered weak.
جَلَّلَ رَسُولُ اللهِ ﷺ قَبْرَ سَعْدٍ بِثَوْبِهِ لَا أَحْفَظُهُ إِلَّا مِنْ حَدِيثِ يَحْيَى بْنِ عُقْبَةَ بْنِ أَبِي الْعَيْزَارِ وَهُوَ ضَعِيفٌ