Charles Ellicott Commentary Exodus 38:1

"And he made the altar of burnt-offering of acacia wood: five cubits was the length thereof, and five cubits the breadth thereof, foursquare; and three cubits the height thereof." — Exodus 38:1 (ASV)

He made the altar.—From the furniture of the sanctuary, the transition is natural to the furniture of the court in which it stood. This is now described. It consisted of the brazen altar, or altar of burnt-offering, and the great brazen laver. The construction of the former is related in Exodus 38:1-7; that of the latter in Exodus 38:8.