question #3 Sahih Muslim 691, Book 6, Hadith 14 : How did the Prophet Muhammad (ﷺ) demonstrate the practice of shortening prayers during his travels?

I asked Anas b. Malik about shortening of prayer. He said: When the Messenger of’ Allah (ﷺ) had covered a distance of three miles or three farsakh (Shu’ba, one of the narrators, had some doubt about it) he observed two rak’ahs.