Sunan Ibn Majah Book 25, Hadith 117

“Ibn ‘Umar was asked: ‘In which month did the Messenger of Allah (ﷺ) perform ‘Umrah?’ He said: ‘In Rajab.’ But ‘Aishah said: “The Messenger of Allah (ﷺ) never performed ‘Umrah during Rajab, and he never performed ‘Umrah, but he (meaning Ibn ‘Umar) was with him.”