Sayyiduna Anas (may Allah be pleased with him) narrates: I performed four rak‘ahs of Zuhr behind the Messenger of Allah (peace and blessings be upon him) in Madinah, and I performed two rak‘ahs of ‘Asr in Dhul-Hulayfah.
Hadith Referenceالمنتقى ابن الجارود / كتاب الصلاة / 145