´Narrated 'Abdullah bin 'Amr [may Allah be pleased with him]:` "A Bedouin said: 'O Messenger of Allah! What is As-Sur?' He said: 'A horn which is blown into.'"
Hadith Referenceسنن ترمذي / كتاب تفسير القرآن عن رسول الله صلى الله عليه وسلم / 3244
Narrated Abdullah ibn Amr ibn al-As: The Prophet ﷺ said: The trumpet (sur) which will be blown.
Shaykh Umar Farooq Saeedi
Benefits and Issues: Angel Israfil (alayhis salam) is standing with the trumpet (soor) in his mouth, awaiting the command of Allah. When the command is given, he will blow into it and the entire world will perish. Then, by the command of Allah, he will blow into it again and all will be resurrected.
Source: Sunan Abu Dawood – Commentary by Shaykh Umar Farooq Saeedi, Page: 4742