'Obstacle' in the Bible

And it will be said,“Build up, build up, prepare the way,Remove every obstacle out of the way of My people.”

Again, when a righteous man turns away from his righteousness and commits iniquity, and I place an obstacle before him, he will die; since you have not warned him, he shall die in his sin, and his righteous deeds which he has done shall not be remembered; but his blood I will require at your hand.