Ezekiel 43:16

And the hearth shall be twelve cubits in length, by twelve in breadth - -square in the four sides thereof.

Exodus 27:1

And thou shalt make the altar of acacia wood, - of five cubits length and five cubits breadth four square, shall the altar be, and three cubits the height thereof.

Exodus 38:1-2

And he made the altar for the ascending-sacrifice of acacia wood, - five cubits, the length thereof and, five cubits, the breadth thereof foursquare, and, three cubits, the height thereof.

2 Chronicles 4:1

And he made an altar of bronze, twenty cubits, the length thereof, and, twenty cubits, the breadth thereof, - and, ten cubits, the height thereof.

Ezra 3:3

So they settled the altar upon its stands, for, dread, was upon them, because of the peoples of the countries, - therefore caused they to go up thereon, ascending-sacrifices unto Yahweh, ascending-sacrifices for the morning and for the 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 thou shalt make the altar of acacia wood, - of five cubits length and five cubits breadth four square, shall the altar be, and three cubits the height thereof.
2 Chronicles 4:1
And he made an altar of bronze, twenty cubits, the length thereof, and, twenty cubits, the breadth thereof, - and, ten cubits, the height thereof.
Ezra 3:3
So they settled the altar upon its stands, for, dread, was upon them, because of the peoples of the countries, - therefore caused they to go up thereon, ascending-sacrifices unto Yahweh, ascending-sacrifices for the morning and for the evening.

Square

Exodus 38:1
And he made the altar for the ascending-sacrifice of acacia wood, - five cubits, the length thereof and, five cubits, the breadth thereof foursquare, and, three cubits, the height thereof.