Yechezkel 42:1-2

Orthodox Jewish Bible

42 Then he [the angelic being] brought me forth into the khatzer hakhatzonah, the way toward the north; and he brought me into the lishka that was opposite the Gizrah, and which was opposite the Binyan toward the north.

² Before the length of a hundred cubits was the Petach HaTzafon, and the width was fifty cubits.