Ezekiel 41:8-10

New International Version

⁸ I saw that the temple had a raised base all around it, forming the foundation of the side rooms. It was the length of the rod, six long cubits. ⁹ The outer wall of the side rooms was five cubits thick. The open area between the side rooms of the temple ¹⁰ and the priests’ rooms was twenty cubits wide all around the temple.