Sahih Bukhari

Narrated Ibn Juraij:`Ikrima bin Khalid asked Ibn `Umar about performing `Umra before Hajj. Ibn `Umar replied, ""There is no harm in it."" `Ikrima said, ""Ibn `Umar also said, 'The Prophet (ﷺ) had performed `Umra before performing Hajj.'"" Narrated `Ikrima bin Khalid: ""I asked Ibn `Umar the same (as above)