Sayyiduna Hudhayfah (may Allah be pleased with him) narrates that he said: O Messenger of Allah! Tell us about the lifespans of your Ummah. The Prophet (peace and blessings be upon him) said: They will be between 50 and 60 years. The people said: O Messenger of Allah! And those who are seventy years old? The Prophet (peace and blessings be upon him) said: Few of my Ummah will reach that age. May Allah Almighty have mercy on those who are seventy years old, and may Allah Almighty have mercy on those who are eighty years old.
Al-Bazzar recorded it; its chain contains a narrator, Uthman bin Matar, who is da'if (weak).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب التوبة / 17567