It is narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Hasten to do good deeds before six things (come). What are you waiting for? Wealth that makes one transgress, or illness that ruins (everything), or old age that clouds the mind, or death that comes suddenly, or the Dajjal, and he is the worst thing that is awaited, or the Hour? And the Hour is most grievous and most bitter."
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated these two hadiths from al-A'raj except Muharrar bin Harun."
Hadith Referenceالمعجم الأوسط / باب الميم / 8498
Hadith Takhrij«أخرجه الحاكم فى «المستدرك» برقم: 8001، والترمذي فى «جامعه» برقم: 2306، وأبو يعلى فى «مسنده» برقم: 6542، والطبراني فى «الأوسط» برقم: 3945»