In the two Sahīh collections (1), Mutarrif reports that ‘Imrān ibn Husayn said: ‘The Messenger of Allah, peace and blessings be upon him, combined Hajj and ‘umrah. He never prohibited this before his death, nor was any Quranic revelation sent down forbidding it.’ Another report from him states: ‘The Prophet of Allah, peace and blessings be upon him, performed tamattu‘, and we performed it with him.’ Thus ‘Imrān, one of the most eminent of the earliest Muslims, reported that he performed tamattu‘ and combined Hajj and ‘umrah.
In the Companions’ usage, someone performing qirān was performing tamattu‘. They therefore required him to offer a sacrificial animal and regarded him as included in Allah’s words: ‘When you are safe, whoever performs ‘umrah followed by Hajj must offer whatever sacrificial animal is readily available’ [al-Baqarah: 196].” He also cited the hadith of ‘Umar: “Someone came to me from my Lord and said: ‘Pray in this blessed valley, and say: an ‘umrah combined with Hajj.’” (2)
He said (3): “Thus, it is reported through the most authentic chains of transmission from the Rightly Guided Caliphs—‘Umar, ‘Uthmān, and ‘Alī—and from ‘Imrān ibn Husayn that the Messenger of Allah, peace and blessings be upon him, combined ‘umrah and Hajj. They called this tamattu‘. Likewise, Anas states that he heard the Prophet, peace and blessings be upon him, reciting the pilgrimage invocation for both Hajj and ‘umrah together.
As for Bakr ibn ‘Abd Allāh al-Muzanī’s report from Ibn ‘Umar that he ‘recited the pilgrimage invocation for Hajj alone,’ the answer is that trustworthy narrators more reliable than Bakr in transmitting from Ibn ‘Umar, such as his son Sālim and Nāfi‘, reported that he said: ‘The Messenger of Allah, peace and blessings be upon him, performed tamattu‘, joining ‘umrah to Hajj.’ These narrators were more reliable in transmitting from (4) Ibn ‘Umar than Bakr. It is therefore more reasonable to attribute an error to Bakr in his report from Ibn ‘Umar than to attribute an error to Sālim (5)