(233) Chapter: The Obligation of Hajj (Pilgrimage) and its Excellence

Ibn 'Abbas (May Allah be pleased with them) reported:
The Prophet (ﷺ) said, "(The performance of) 'Umrah during Ramadan is equal to Hajj (pilgrimage)." Or said, "Equal to the performance of Hajj with me."

[Al-Bukhari and Muslim].

Commentary: "Equal to the performance of Hajj'' means the return and reward to which Hajj is eligible. It does not mean that it will serve as a substitute for Hajj and absolve one from the need to perform it. This distinction of `Umrah in the month of Ramadan is perhaps for the reason, that in this way two acts of worship are combined at one time.