Hadith 8:1673
Abu Bakr narrated to us, he said: Abu Mu'awiyah narrated to us, from Ubayd Allah, from Nafi', from Ibn Umar, from Umar, that he performed Hajj throughout his entire caliphate, performing Hajj al-Ifrad (Hajj alone).
حدثنا أبو بكر قال حدثنا أبو معاوية عن عبيد الله عن نافع عن بن عمر عن عمر أنه حج خلافته كلها يفرد الحج