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