Jubayr ibn Mut’im reported: The Messenger of Allah, peace and blessings be upon him, said, “Verily, I have many names: I am Muhammad, I am Ahmad, I am the eraser through whom Allah erases unbelief, I am the gatherer at whose feet the people will be gathered, and I am the last prophet after which there are none.”
Jubayr said, “And Allah has named him as kind and merciful.”
Source: Ṣaḥīḥ Muslim 2354
Grade: Sahih (authentic) according to Muslim
عَنْ جُبَيْرِ بْنِ مُطْعِمٍ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ إِنَّ لِي أَسْمَاءً أَنَا مُحَمَّدٌ وَأَنَا أَحْمَدُ وَأَنَا الْمَاحِي الَّذِي يَمْحُو اللَّهُ بِيَ الْكُفْرَ وَأَنَا الْحَاشِرُ الَّذِي يُحْشَرُ النَّاسُ عَلَى قَدَمَيَّ وَأَنَا الْعَاقِبُ الَّذِي لَيْسَ بَعْدَهُ أَحَدٌ
وقال جُبَيْر وَقَدْ سَمَّاهُ اللَّهُ رَءُوفًا رَحِيمًا
2354 صحيح مسلم كتاب الفضائل باب في أسمائه صلى الله عليه وسلم