Praying Two Units after Doing Wudu

559. Abu Hurayra, may Allah be pleased with him, reported that the Messenger of Allah, peace and blessings be upon him, said to Bilal, “Bilal, tell me that action that you have done since entering Islam which gives you the most reason to hope for I heard the sound of your sandals ahead of me in the Garden.” He said, “I have done no action which gives me more reason to hope than that of never purifying myself at any time of the night or day without then praying after that purification as much as is written for me to pray.” (Sahih al-Bukhari, Tahajjud, 17; Sahih Muslim, Fadailu’s-Sahaba, 108).

Nawawi, Imam. Riyad As-Salihin; The Gardens of the Righteous: A collection of authentic hadiths. Tughra Books Press, Inc. 2014