Sayyiduna Urwah al-Bariqi (may Allah be pleased with him) said: The Messenger of Allah (peace and blessings be upon him) said: "Performing Umrah in Ramadan is equal to a Hajj." (Imam al-Tabarani (may Allah have mercy on him) said:) Amr al-Awdi narrated it like this from his father from Sufyan, whereas other people narrated it from Sufyan, from Jabir, from al-Sha'bi, from Sayyiduna Wahb bin Khanbash (may Allah be pleased with him), and that is correct.
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 14475