Ezekiel 40:13

‘And he measured the gate from the top of one side room to the top of another, a breadth of twenty five cubits, door to door.'

The twenty five cubits is possibly represented by adding the six cubits of two opposite side rooms, to the thirteen cubits which is ‘the breadth of the gate' (i.e. of the inner corridor). Thus the important multiple of five, the covenant number, is maintained (the sixes and the thirteen being required for this reason). ‘Door to door' might suggest a back door in the wall of each guard room leading into the outer court, so that the rooms could be entered or left by means of the outer court without using the main gateway.