2 Chronicles 4:2, 6, 14-15

Then he made the sea of cast metal. It was round, ten cubits from brim to brim, and five cubits high, and a line of thirty cubits measured its circumference.

He also made ten basins in which to wash, and set five on the south side, and five on the north side. In these they were to rinse off what was used for the burnt offering, and the sea was for the priests to wash in.

He made the stands also, and the basins on the stands, and the one sea, and the twelve oxen underneath it.