Sunan Ibn Majah, Volume 4, Book 25, Hadith 2998 (DarusSalam) ⓘ

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

حَدَّثَنَا أَبُو كُرَيْبٍ، حَدَّثَنَا يَحْيَى بْنُ آدَمَ، عَنْ أَبِي بَكْرِ بْنِ عَيَّاشٍ، عَنِ الأَعْمَشِ، عَنْ حَبِيبٍ، - يَعْنِي ابْنَ أَبِي ثَابِتٍ - عَنْ عُرْوَةَ، قَالَ سُئِلَ ابْنُ عُمَرَ فِي أَىِّ شَهْرٍ اعْتَمَرَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ قَالَ فِي رَجَبٍ ‏.‏ فَقَالَتْ عَائِشَةُ مَا اعْتَمَرَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ فِي رَجَبٍ قَطُّ وَمَا اعْتَمَرَ إِلاَّ وَهُوَ مَعَهُ - تَعْنِي ابْنَ عُمَرَ ‏.‏