'Herd' in the Bible

Now there was a herd of many pigs feeding far away from them.

The demons begged him, saying, "If you cast us out, permit us to go away into the herd of pigs."

He said to them, "Go!" They came out, and went into the herd of pigs: and behold, the whole herd of pigs rushed down the cliff into the sea, and died in the water.