Fiqh-us-Sunnah Volume 5, Hajj and ‘Umrah, Fiqh 5.121A.
Section : Repeated Performance of ‘Umrah.
Nafi’ said, “During the rein of Ibn Az-Zubair, Abdullah bin ‘Umar performed an ‘Umrah twice a year.” Al-Qasim said, “Aishah performed three ‘Umrahs in one year.”
Some people asked if any of the scholars criticised her for this. He replied, “May Allah be blessed! (Criticise) the Mother of Believers?!!” The majority of scholars supports this view. Malik, however, holds that the repetition of ‘Umrah more than once a year is disliked.