Mujahid (may Allah have mercy on him) said: It reached us that Sayyiduna Abu Dharr (may Allah be pleased with him) said: I saw the Prophet (peace and blessings be upon him) holding the knocker of the door of the Ka'bah, and he (peace and blessings be upon him) said three times: "There is no prayer after Asr except in Makkah."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 4416