Aslam Abu Imran narrates: I performed Hajj and met Sayyidah Umm Salamah (may Allah be pleased with her), and she said: I heard the Messenger of Allah (peace and blessings be upon him) saying: "Whoever among you performs Hajj, let him enter ihram for both Hajj and Umrah together."
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 20093