Book 20, Number 20.19.66:

Yahya related to me from Malik, from Sumayy, the mawla of Abu Bakr ibn Abd ar-Rahman, from Abu Salih as-Samman, from Abu Hurayra, that the Messenger of Allah, may Allah bless him and grant him peace ,said, "Umra is an expiation for what is between it and the next umra, and the only reward for an accepted hajj is the Garden."