Revelation 21:15-17

Young's Literal Translation

¹⁵ And he who is speaking with me had a golden reed, that he may measure the city, and its gates, and its wall;

¹⁶ and the city lieth square, and the length of it is as great as the breadth; and he did measure the city with the reed -- furlongs twelve thousand; the length, and the breadth, and the height, of it are equal;

¹⁷ and he measured its wall, an hundred forty-four cubits, the measure of a man, that is, of the messenger;