Ezekiel 40:2-12

2 He brought me, in visions of God, to the land of Israel, and set me down upon a very high mountain, on which was a structure like a city to the south.
3 When he brought me there, a man was there, whose appearance shone like bronze, with a linen cord and a measuring reed in his hand; and he was standing in the gateway.
4 The man said to me, "Mortal, look closely and listen attentively, and set your mind upon all that I shall show you, for you were brought here in order that I might show it to you; declare all that you see to the house of Israel."
5 Now there was a wall all around the outside of the temple area. The length of the measuring reed in the man's hand was six long cubits, each being a cubit and a handbreadth in length; so he measured the thickness of the wall, one reed; and the height, one reed.
6 Then he went into the gateway facing east, going up its steps, and measured the threshold of the gate, one reed deep. There were
7 recesses, and each recess was one reed wide and one reed deep; and the space between the recesses, five cubits; and the threshold of the gate by the vestibule of the gate at the inner end was one reed deep.
8 Then he measured the inner vestibule of the gateway, one cubit.
9 Then he measured the vestibule of the gateway, eight cubits; and its pilasters, two cubits; and the vestibule of the gate was at the inner end.
10 There were three recesses on either side of the east gate; the three were of the same size; and the pilasters on either side were of the same size.
11 Then he measured the width of the opening of the gateway, ten cubits; and the width of the gateway, thirteen cubits.
12 There was a barrier before the recesses, one cubit on either side; and the recesses were six cubits on either side.