It is narrated from Sayyiduna Sahl bin Sa'd (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "When Allah Almighty lets a servant reach the age of sixty, He has left him no excuse and has given him full respite in life."
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 5912