'Encircle' in the Bible

He cast the two pillars [out of] bronze; eighteen cubits [was] the height of the first, and a cord of twelve cubits would encircle the second pillar.

He also made the molten sea, ten cubits {in diameter}, and five cubits [was] its height. A measuring line of thirty cubits would encircle it all around.

Bring me out of prison, that I may give thanks to your name. [The] righteous will encircle me, because you will deal bountifully with me.