Musnad Abu Ya'la al-Mawsili 106:7

Abu Abd al-Rahman al-Adhrami narrated to us, Ishaq al-Azraq narrated to us, Zakariya narrated to us, from Abu Ishaq, from al-Bara’ who said: The Messenger of Allah (may Allah bless him and grant him peace) performed ‘Umrah before the Hajj. He said: And Aisha said: He certainly knew that he performed ‘Umrah four times, for his ‘Umrah was during the Farewell Pilgrimage.