It wasnarrated that 'Abdullah bin 'Umar said:
"I heard the Messengerof Allah (ﷺ) say: 'Whoever performs Tawaf around the House andpraystwo Rak'ah, it is as if he freed a slave.'"
English reference: Vol. 4, Book 25, Hadith 2956
Arabic reference: Book 25, Hadith 3069