John Gill Commentary 2 Chronicles 6:13

"(for Solomon had made a brazen scaffold, five cubits long, and five cubits broad, and three cubits high, and had set it in the midst of the court; and upon it he stood, and kneeled down upon his knees before all the assembly of Israel, and spread forth his hands toward heaven;)" — 2 Chronicles 6:13 (ASV)

(See Gill on 2 Chronicles 5:1).