'Fall Away' in the Bible

But whoever shall cause one of these little ones that believe in me to fall away, it were better for him to have a great millstone hung round his neck, and be swallowed up in the depth of the sea.

And then will many fall away; and will deliver up one another, and will hate one another.

Then Jesus saith to them, This night will all of you fall away from me; for it is written, "I will smite the shepherd, and the sheep of the flock will be scattered."

Peter answering said to him, Though all should fall away from thee, yet will I never fall away.