Mujahid said:
Ibn 'Umar was asked: How many times did the Messenger of Allah ﷺ perform 'Umrah ? He said: Twice. 'Aishah said: Ibn 'Umar knew that the Messenger of Allah ﷺ performed three 'Umrahs in addition to the one he combined with the Farewell Pilgrimage.

حَدَّثَنَا النُّفَيْلِيُّ، حَدَّثَنَا زُهَيْرٌ، حَدَّثَنَا أَبُو إِسْحَاقَ، عَنْ مُجَاهِدٍ، قَالَ سُئِلَ ابْنُ عُمَرَ كَمِ اعْتَمَرَ رَسُولُ اللَّهِ ﷺ فَقَالَ مَرَّتَيْنِ . فَقَالَتْ عَائِشَةُ لَقَدْ عَلِمَ ابْنُ عُمَرَ أَنَّ رَسُولَ اللَّهِ ﷺ قَدِ اعْتَمَرَ ثَلاَثًا سِوَى الَّتِي قَرَنَهَا بِحَجَّةِ الْوَدَاعِ .