Ezekiel 43:16

And the lion of God, twelve the length by twelve the breadth; four square to its four squares.

Exodus 27:1

And make the altar acacia wood, five cubits the length, and five cubits the breadth; and the altar shall be quadrated: and three cubits its height

Exodus 38:1-2

And he will make the altar of burnt-offering of acacia wood: five cubits its length, and five cubits its breadth; four-square; and three cubits its height

2 Chronicles 4:1

And he will make an altar of brass, twenty cubits its length, and twenty cubits its breadth, and ten cubits its height

Ezra 3:3

And they will prepare the altar upon its foundations; for in the terror upon them from the people of the lands: and they will bring up burnt-offerings upon it to Jehovah, burnt-offerings for morning and for evening.

Treasury of Scripture Knowledge

Summary

And the altar shall be twelve cubits long, twelve broad, square in the four squares thereof.

Square

Bible References

Twelve cubits

Exodus 27:1
And make the altar acacia wood, five cubits the length, and five cubits the breadth; and the altar shall be quadrated: and three cubits its height
2 Chronicles 4:1
And he will make an altar of brass, twenty cubits its length, and twenty cubits its breadth, and ten cubits its height
Ezra 3:3
And they will prepare the altar upon its foundations; for in the terror upon them from the people of the lands: and they will bring up burnt-offerings upon it to Jehovah, burnt-offerings for morning and for evening.

Square

Exodus 38:1
And he will make the altar of burnt-offering of acacia wood: five cubits its length, and five cubits its breadth; four-square; and three cubits its height