It is narrated from Sayyidah al-Shifa' (may Allah be pleased with her) that the Prophet (peace and blessings be upon him) was asked: Which deed is best? He ((peace and blessings be upon him)) said: "Faith in Allah, jihad in the way of Allah, and an accepted Hajj (Hajj mabrur)."
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 21164