'Stumbling blocks' in the Bible

Therefore thus says the LORD, Behold, I will lay stumblingblocks before this people, and the fathers and the sons together shall fall upon them; the neighbor and his friend shall perish.

I will consume man and beast; I will consume the fowls of the heaven, and the fish of the sea, and the stumbling blocks with the wicked; and I will cut off man from off the land, says the LORD.