'Assuredly' in the Bible

Then the Lord reached out his hand and touched my mouth and said to me, "I will most assuredly give you the words you are to speak for me.

So, this is what the Lord says: 'I will assuredly make these people stumble to their doom. Parents and children will stumble and fall to their destruction. Friends and neighbors will die.'

So the Lord says, 'I will most assuredly remove you from the face of the earth. You will die this very year because you have counseled rebellion against the Lord.'"