Sayyiduna Ibn Abbas (may Allah be pleased with them both) said: The Messenger of Allah (peace and blessings be upon him) said: "O people of Makkah, do not shorten the prayer over a distance less than four barids, (the distance) from Makkah to Usfan."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 11116