Abu Hurairah (May Allah be pleased with him) reported:
The Messenger of Allah (ﷺ) said, "(The performance of) 'Umrah is an expiation for the sins committed between it and the previous 'Umrah; and the reward of Hajj Mabrur (i.e., one accepted) is nothing but Jannah."[Al-Bukhari and Muslim].
App reference: Book 11, Hadith 5
Arabic/English book reference: Book 11, Hadith 1275