Sahih Muslim Book 4, Hadith Number 966.

Chapter : Moderation in the articles of prayers and their shortening and perfection.

This Hadith with the same chain of transmitters has been narrated by Shu’ba, and in the narration of Mu’adh the words are: “just as the white garment is cleansed from filth,” and in the narration of Yazid: “from dirt”.