It was narrated from Nafi’ that ‘Abdullah bin ‘Abdullah and Salim bin ‘Abdullah told him, that they spoke to ‘Abdullah bin ‘Umar when the army besieged Ibn Az Zubair before he was killed. They said: “It does not matter if you do not perform Hajj this year; we are afraid lest we are prevented from reaching the Hlouse.” He said: We went out with the Messenger of Allah صلی اللہ علیہ وآلہ وسلم and the disbelievers of the Quraish prevented us from reaching the House. So the Messenger of Allah صلی اللہ علیہ وآلہ وسلم slaughtered his HadI and shaved his head. I ask you to bear witness that I have resolved to perform ‘Umrah. If Allah wills I will set out and if I am allowed to reach the House I will circumambulate it, and if I am prevented from reaching the House I will do what the Messenger of Allah صلی اللہ علیہ وآلہ وسلم did when I was with him.” Then he traveled for a while, then he said: “They are both the same. I ask you to bear witness that I have resolved to perform Hajj as well as ‘Umrah.” And he did not exit Ihram for either until he exited Ihram on the Day of Sacrifice and offered his HadI. (Sahih)