Abdullah bin Abbas reported,

The Prophet ﷺ said to a woman of the Ansar named Umm Sinan, "What kept you from performing Hajj with us?"She replied, "We had two camels for carrying water. The father of so-and-so, meaning her husband, took one of them for Hajj along with his son, and the other was used by our servant boy to bring water."He said, "An Umrah in Ramadan equals a Hajj, or a Hajj with me."

Azami 5371

Sahih

عن ابن عباس

أن النبي ﷺ قال لامرأة من الأنصار يقال لها: أم سنان: ما منعك أن تكوني حججت معنا؟ قالت: ناضحان كانا لأبي فلان (زوجها) حج هو وابنه على أحدهما، وكان الآخر يسقي غلامنا. قال: فعمرة في رمضان تقضي حجة أو حجة معي.

الأعظمي 5371صحيح
Contents
Reference
Commentary
Ayat
Collection
Jami al-Kamil
Book
Hajj
Chapter
Umrah
Section
Virtue of Umrah in Ramadan
Numbering
Jami al-Kamil 5371 (2nd edition)