Sunan Ibn Majah
2956
Sahih+2

It was narrated that ‘Abdullah bin ‘Umar said:“I heard the Messenger of Allah (ﷺ) say: ‘Whoever performs Tawaf around the House and prays two Rak’ah, it is as if he freed a slave.’”

SahihAl-Albani
SahihMuhammad Fouad Abd al-Baqi