What is the obligation of a man if he doubts the number of his tawaf circuits?

Question:
The questioner says: I performed tawaf around the House, and I doubted whether this tawaf was six or seven circuits, so I started by subtracting. Is my action correct? May Allah reward you with good.

Answer:
Yes, if he doubts during the tawaf while he is performing it, whether he has done six or seven circuits, he considers it six and builds upon the lesser number and completes it, because this is what is certain. So he builds upon what is certain and performs the doubtful part so that he exits the act of worship with certainty. Likewise, if he doubts the number of rak'ahs in the prayer while he is praying, whether he prayed two or three, he considers it two, or if he doubts whether he prayed three or four, he considers it three. He builds upon the lesser number because it is what is certain, then he performs the doubtful part so that he exits the obligation with certainty.