"The Messenger of Allah combined Hajj and "Umrah, then he passed away before he could forbid that, and before Qur'an was revealed forbidding it.
Sunan an-Nasa'i Book 24, Hadith 108
← Previous Hadith "I was with 'Ali bin Abi Talib when the Messenger of All appointed him as governor of Yemen. When he came to the Messenger of Allah, Ali said: 'I came to the Messenger of and the Messenger of Allah said: "What did you do?" I said; "I entered Ihram for that for which you entered Ihram." He said: "I have brought the Hadi and am performing Qiran" And he said to his companions: "If I had known what I know now, I would have done what you have done, but I brought the Hadi and I am performing Qiran

Sunan an-Nasa'i Book 24, Hadith 107 Next Hadith → That the Messenger of Allah combined Hajj and "Umrah, then no Qur'an was revealed concerning that, and the Prophet did not forbid it, regardless of what one man may say.

Sunan an-Nasa'i Book 24, Hadith 109