The Messenger of Allah ﷺ said, "An Umra to the next Umra is an expiation for what is between them, and an accepted Hajj has no reward except Paradise."
أخبرنا قتيبة بن سعيد عن مالك عن سمي عن أبي صالح
قال رسول الله ﷺ العمرة إلى العمرة كفارة لما بينهما والحج المبرور ليس له جزاء إلا الجنة
Muslim, no. 1349, and Bukhari, no. 1773 (see the earlier hadith, no. 2624), from the hadith of Malik through this same chain. It is also found in Muwatta (Yahya's version), 1/346, and Kubra, no. 3608.