The Prophet ﷺ said, "An Amra performed during Ramadan equals a Hajj."
حدثنا جبارة بن المغلس حدثنا إبراهيم بن عثمان عن أبي إسحق عن الأسود بن يزيد
عن النبي ﷺ قال عمرة في رمضان تعدل حجة
[Sahih] Reported by Tirmidhi, Hajj, chapter on what has been said regarding umrah in Ramadan, no. 939, through another route from Abu Ishaq, and he said hasan ghareeb. Jabbarah has been mentioned before, no. 740, and Ibrahim has been mentioned before, no. 1495. Neither of them was alone in narrating it, and Abu Ishaq used the form "an" (indicating a possibly interrupted chain), mentioned before, no. 46, and no. 2991 serves as a corroborating witness for it.