Mukhtasar Muslim

Narrated from Sayyiduna Anas bin Malik (may Allah be pleased with him) that a man asked the Noble Prophet (peace and blessings of Allah be upon him), "When will the Hour (Day of Judgment) be?" The Prophet (peace and blessings of Allah be upon him) remained silent for a while, then looked at a child from the tribe of Azd Shanu’ah who was sitting in front of him and said, "If this child lives long, he will not grow very old before your Hour will be established." Sayyiduna Anas (may Allah be pleased with him) said that this boy was my age on that day.

‘Umm al-Mu’minin A’ishah Siddiqa (may Allah be pleased with her) says that when the Bedouins would come to the Messenger of Allah (peace and blessings be upon him), they would ask about the Hour, when it would occur. The Prophet (peace and blessings be upon him) would look at the youngest among them and say: “If he lives, he will not grow old before your Hour will be established.” (Because your Hour is that you die. The meaning is the minor resurrection, and that is death.)