What is the ruling for one who doubts the number of his tawaf (circumambulation of the Ka'bah) circuits?

Question:
He says: Doubt enters me regarding the tawaf, as to whether we were in the third or fourth circuit, and I have a ten-year-old child with me who insists that we were in the fourth circuit. After the tawaf, we completed the sa'y, but I have a lingering concern in my heart regarding the tawaf, so I returned to the Ka'bah and performed a circuit to resolve the doubt. What is the ruling on my action?

Answer:
If you are convinced that the tawaf was completed, you build upon your conviction. However, if the two possibilities are equal in your mind, and you doubted during the tawaf such that neither side was more likely than the other, then you build upon certainty. So if you doubt whether you performed four or five circuits, you count it as four and perform the fifth and any subsequent ones. But if you finished the tawaf and left, and the doubt occurred after you had left, then do not pay attention to it, because doubt after the act of worship does not affect it.