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Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
bukhari:1390b – Muḥammad b. Muqātil > ʿAbdullāh > Abū Bakr b. ʿAyyāsh > Sufyān al-Tammār

Sufyan at-Tammar told me that he had seen the grave of the Prophet ﷺ elevated and convex.  

البخاري:١٣٩٠b – حَدَّثَنَا مُحَمَّدُ بْنُ مُقَاتِلٍ أَخْبَرَنَا عَبْدُ اللَّهِ أَخْبَرَنَا أَبُو بَكْرِ بْنُ عَيَّاشٍ عَنْ سُفْيَانَ التَّمَّارِ

أَنَّهُ حَدَّثَهُ أَنَّهُ رَأَى قَبْرَ النَّبِيِّ ﷺ مُسَنَّمًا