'Doing' in the Bible

Take it of them, that they may be used in doing the service of the tent of meeting; and thou shalt give them unto the Levites, to every man according to his service.

And the children of Israel said unto him, We will go up by the highway; and if we drink of thy water, I and my cattle, then will I give the price thereof: let me only, without doing anything else , pass through on my feet.