That the Prophet said: "Umrah has been entered into Hajj until the Day of Resurrection."
Jami` at-Tirmidhi Book 9, Hadith 125
← Previous Hadith The Prophet was asked about whether Umrah was obligatory? He said: "No. But if you perform Umrah it is more virtuous."

Jami` at-Tirmidhi Book 9, Hadith 124 Next Hadith → "Umrah to 'Umrah atones for the sins between them, and for A1-Hajj Al-Mabrur there is no reward except Paradise."

Jami` at-Tirmidhi Book 9, Hadith 126