The Messenger of Allah ﷺ said, "An Umrah performed in Ramadan equals a Hajj."
حدثنا عبد الجبار بن محمد الخطابي حدثنا عبيد الله يعني ابن عمرو الرقي عن عبد الكريم عن عطاء
قال رسول الله ﷺ عمرة في رمضان تعدل حجة
Its chain of transmission is sahih. Abdul-Jabbar bin Muhammad Khattabi Adawi was graded trustworthy by Ibn Hibban, while Ibn Abu Hatim and Bukhari said nothing about him. As for Ubaydullah bin Amr Raqqi and Abdul-Kareem bin Malik Jazari, they are both trustworthy. The hadith has already been mentioned at 14731.