Whoever is uncertain about the number of circuits (Sa'i) performed should restart the Sa'i. If someone performs eight circuits between Safa and Marwah, they must repeat the Sa'i. However, if they perform nine circuits, there is no penalty upon them. The reasoning (Fiqh) behind this is that completing eight circuits means starting and ending at Marwah, which contradicts the Sunnah. On the other hand, performing nine circuits means starting at Safa and ending at Marwah, which aligns with the prescribed order. If someone begins at Marwah instead of Safa, they must repeat the Sa'i. Additionally, if someone omits some of the "raml" (specific vigorous walking) during their Sa'i, there is no penalty for that.