Sayyiduna Anas bin Malik (may Allah be pleased with him) says: The Messenger of Allah (peace and blessings be upon him) performed four rak'ahs of Zuhr prayer in Madinah and two rak'ahs of Asr prayer at Dhul-Hulaifah (while going to Makkah).
Hadith Referenceسنن دارمي / من كتاب الصللاة / 1547