Abu Imran reported,

I performed Hajj with my masters, then I went to visit Umm Salama, the wife of the Prophet ﷺ, and asked her, "Should I perform Umrah before I perform Hajj?"She replied, "If you wish, perform Umrah before Hajj, and if you wish, after Hajj."I said, "People are saying that whoever has never performed Hajj before should not perform Umrah before performing Hajj."So I went and asked the Mothers of the Believers, and they said the same as she had said. I returned to her and told her what they had said.She said, "Yes, and let me put your mind at ease. I heard the Messenger of Allah ﷺ say, 'Enter the state of ihram, family of Muhammad, with Umrah combined with Hajj.'"

Azami 4945

Sahih

عن أبي عمران أسلم أنه قال

حججت مع موالي، فدخلت على أم سلمة زوج النبي ﷺ فقلت: أعتمر قبل أن أحج؟ قالت: إن شئت فاعتمر قبل أن تحج، وإن شئت بعد أن تحج. قال: فقلت إنهم يقولون: من كان صرورة فلا يصلح أن يعتمر قبل أن يحج. قال: فسألت أمهات المؤمنين، فقلن مثل ما قالت، فرجعت إليها فأخبرتها بقولهن. قال: فقالت: نعم وأشفيك سمعت رسول الله ﷺ يقول: أهلوا يا آل محمد بعمرة في حج.

الأعظمي 4945صحيح
Contents
Reference
Commentary
Ayat
Collection
Jami al-Kamil
Book
Hajj
Chapter
Description of the Hajj of the Prophet ﷺ as narrated by Jabir and others, and the rulings mentioned therein
Section
Recommendation of entering ihram for tamattu to Hajj
Numbering
Jami al-Kamil 4945 (2nd edition)
Azami 4945