It is narrated from Hazrat Anas bin Malik (may Allah be pleased with him) that I offered four rak'ahs with the Prophet (peace and blessings of Allah be upon him) in Madinah Munawwarah and two rak'ahs in Dhul-Hulaifah.
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 12098