Jeremiah 52:21-22

21Now concerning the pillars: the height of one pillar was eighteen cubits, a measuring line of twelve cubits could measure its circumference, and its thickness was four fingers; it was hollow.

22A capital of bronze was on it; and the height of one capital was five cubits, with a network and pomegranates all around the capital, all of bronze. The second pillar, with pomegranates was the same.