Sayyiduna Suraqah bin Malik bin Ju'shum (may Allah be pleased with him) said: The Messenger of Allah (peace and blessings be upon him) entered ihram for Hajj and Umrah together, and I heard him (peace and blessings be upon him) say: "Umrah has entered into Hajj until the Day of Resurrection."
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 6567