I heard the Messenger of Allah ﷺ say, "Whoever circumambulates the House and prays two rakahs, it is equivalent to freeing a slave."
حدثنا علي بن محمد حدثنا محمد بن الفضيل عن العلاء بن المسيب عن عطاء
سمعت رسول الله ﷺ يقول من طاف بالبيت وصلى ركعتين كان كعتق رقبة
No references are available.
Sourcing, its chain is hasan. Busiri said, "This chain has trustworthy narrators," and Munziri indicated that it is hasan, saying it was narrated by Ibn Majah and Ibn Khuzayma in his Sahih.