Hadith 8:1023
Abu Bakr narrated to us, he said: Abd al-Wahhab narrated to us, from Ayyub, from Muhammad, from Zayd ibn Thabit, regarding the one who performs Umrah before he performs Hajj. He said: "They are two rituals for Allah upon you; it does not harm you with which of them you begin."
حدثنا أبو بكر قال حدثنا عبد الوهاب عن أيوب عن محمد عن زيد بن ثابت في الذي يعتمر قبل أن يحج قال نسكان لله عليك لا يضرك بأيهما بدأت