The wording points toward the side of the Kaaba's door. Starting at the Black Stone, the pilgrim moves around the Kaaba while keeping it on the left, until reaching the same starting alignment again.
A round means completing this circuit, not stepping a short distance away and immediately returning.
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Book of Hajj: Entering Mecca and Tawaf al-Qudum
The wording points toward the side of the Kaaba's door. Starting at the Black Stone, the pilgrim moves around the Kaaba while keeping it on the left, until reaching the same starting alignment again.
A round means completing this circuit, not stepping a short distance away and immediately returning.