Sawdah (may Allah be pleased with her), the wife of the Prophet (peace and blessings be upon him), said: I said: O Messenger of Allah! When he walks, should Uthman bin Maz'un lead us in prayer until he comes to us? The Messenger of Allah (peace and blessings be upon him) said to her: "O daughter of Zam'ah! If you had knowledge of death, you would know that it is far more severe than you estimate."
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 20461