'Empty' in the Bible

Until the LORD removes people far away, and there are many empty places in the middle of the land.

so will my message be that goes out of my mouth it won't return to me empty. Instead, it will accomplish what I desire, and achieve the purpose for which I sent it.

No one brings a lawsuit fairly, and no one goes to law honestly; they have relied on empty arguments and they tell lies; they conceive trouble and give birth to iniquity.