'Piping' in the Bible

Why did you tarry among the sheepfolds, to hear the piping for the flocks? Among the clans of Reuben there were great searchings of heart.

And all the people come up after him, and the people are piping with pipes, and rejoicing -- great joy, and the earth rendeth with their voice.

And it will be in that day that the Lord will make a piping sound for the fly which is in the end of the rivers of Egypt, and for the bee which is in the land of Assyria.