He did ‘umrah as part of Hajj tamattu‘, then he went out of Makkah; does he have to come back in ihraam for Hajj?
Question

                If someone does ‘umrah during the months of Hajj as part of Hajj tamattu‘ [‘umrah followed by Hajj, exiting ihraam in between], then he goes to visit the Prophet’s Mosque in between ‘umrah and Hajj, or he goes out to at-Taa’if, does he have to enter ihraam when he comes back to Makkah, when he is doing tamattu‘?
Praise be to Allah.He does not have to enter ihraam [at that point]. If the one who is doing tamattu‘ does ‘umrah, then goes out from Makkah to at-Taa’if or Jeddah or Madinah, then comes back, he does not have to enter ihraam for Hajj (yet), because he has come back to the place where he is staying. As he has come as a pilgrim, Makkah is regarded as the place where he is staying, so if he travels to Madinah then comes back, he has come back to the place where he is staying. Therefore he should enter ihram for Hajj on the day of at-Tarwiyah [i.e., 8th Dhu’l-Hijjah] from Makkah, as if he is one of the residents of Makkah who went to Madinah during the months of Hajj, then came back from Madinah having the intention to do Hajj this year. So he does not have to enter ihram for Hajj from anywhere other than Makkah. End quote.
Majmoo‘ Fataawa Ibn ‘Uthaymeen (22/78).