Silsilat al-Ahadith al-Sahihah

The Messenger of Allah (peace and blessings be upon him) said: "The example of my Ummah is like that of rain; it is not known whether there is goodness in its beginning or in its end." This hadith is narrated from Sayyiduna Ammar bin Yasir, Sayyiduna Abdullah bin Umar, Sayyiduna Ali bin Abi Talib, and Sayyiduna Abdullah bin Amr (may Allah be pleased with them).