Authentic
Muttafaq ‘alayh (Bukhari and Muslim) No. 1861
I have five names. I am Muhammad. I am Ahmad. I am Al-Māhi (the effacer), by whom Allah effaces disbelief. I am Al-Hāshir (the gatherer), at whose feet people will be gathered. I am Al-‘Āqib (the last)
Jubayr ibn Mut‘im (may Allah be pleased with him) reported that the Messenger of Allah (may Allah's peace and blessings be upon him) said: "I have five names. I am Muhammad. I am Ahmad. I am Al-Māhi (the effacer), by whom Allah effaces disbelief. I am Al-Hāshir (the gatherer), at whose feet people…
" لِي خَمْسَةُ أَسْمَاءٍ أَنَا مُحَمَّدٌ وَأَنَا أَحْمَدُ وَأَنَا الْمَاحِي الَّذِي يَمْحُو اللَّهُ بِيَ الْكُفْرَ وَأَنَا الْحَاشِرُ الَّذِي يُحْشَرُ النَّاسُ عَلَى قَدَمِي وَأَنَا الْعَاقِبُ "