It wasnarrated from Wahb bin Khanbash that the Messenger of Allah(ﷺ)said:
" 'Umrah during Ramadan is equivalent to Hajj (i.e. inreward)." (FR)
English reference (FR): Vol. 4, Book 25, Hadith 2991 (FR)
Arabic reference (FR): Book 25, Hadith 3105 (FR)