'Encircled' in the Bible

Also he made the molten sea of ten cubits from brim to brim, round in compass; and its height was five cubits; and a line of thirty cubits encircled it.

Under it was the likeness of oxen, which encircled it, for ten cubits, encircling the sea. The oxen were in two rows, cast when it was cast.

Now after this he built an outer wall to the city of David, on the west side of Gihon, in the valley, even to the entrance at the fish gate; and he encircled Ophel [with it], and raised it up to a very great height: and he put valiant captains in all the fortified cities of Judah.