Silsilat al-Ahadith al-Sahihah

The Messenger of Allah (peace and blessings be upon him) said: "What I fear most for my Ummah is the misguiding leaders and rulers." This hadith is narrated from Sayyiduna Umar bin Khattab, Sayyiduna Abu Darda, Sayyiduna Abu Dharr Ghifari, the freed slave of the Messenger Sayyiduna Thawban, Sayyiduna Shaddad bin Aws, and Sayyiduna Ali bin Abi Talib (may Allah be pleased with them all).