Exodus 27:13 KJV

And the breadth of the court on the east side eastward shall be fifty cubits.
Exodus 27:13, King James Version

In context

12 And for the breadth of the court on the west side shall be hangings of fifty cubits: their pillars ten, and their sockets ten.

13 And the breadth of the court on the east side eastward shall be fifty cubits.

14 The hangings of one side of the gate shall be fifteen cubits: their pillars three, and their sockets three.