Anas b. Malik reported that a person asked Allah's Apostle (ﷺ):When would the Last Hour come? Thereupon Allah's Messenger (way peace be upon him) kept quiet for a while. Then looked at a young boy in his presence belonging to the tribe of Azd Shanu'a and he said: If this boy lives he would not grow very old till the Last Hour would come to you. Anas said that this young boy was of our age during those days

English translation · Sahih Muslim