'Stumbling blocks' in the Bible

Wherefore, Thus, saith Yahweh, Behold me! laying before this people, stumblingblocks, - And fathers and sons together, shall stumble against them, The neighbour and his friend, shall perish.

I will take away man and beast, I will take away the bird of the heavens and the fishes of the sea, and the stumblingblocks, even them who are lawless, - and will cut off mankind, from off the face of the ground, Declareth Yahweh.