Ezekiel 45:2

Of this there shall be for the sanctuary five hundred in length, with five hundred in breadth, square round about; and fifty cubits round about for the suburbs thereof.

Cross-reference

Ezekiel 45:1 sets the larger holy district; this verse defines the sanctuary square within it, so the earlier verse provides the outer boundary.

Ezekiel 42:16-20 measures the temple area as a 500-cubit square, matching the sanctuary square described here—likely the same space.

Ezekiel 42:20 mentions a 500-cubit square wall separating holy from common—directly corresponding to the sanctuary square here.