'Thirty' in the Bible

And he brought me to the outer courtyard, and there were chambers and a pavement made for the courtyard all around [it], [and] thirty chambers [were facing] to the pavement.

And the side rooms [were] {side by side} [in] three [stories] and [a total of] thirty {rooms}, and [there were] offsets in the wall, which [was] for the temple for the side rooms, {all the way around} to be supports, and [so] they were not supports [extending] into the wall of the temple.

In the four corners of the courtyard [were] small courtyards forty [cubits] [in] length and thirty [cubits] [in] width, [each with] {the same measurements} for the four of them with corners.