In that day I will perform against Eli all things which I have spoken concerning his house: when I begin, I will also make an end. I will perform - all things which I have spoken - That is, what He had declared by the prophet, whose message is related 1 Samuel 2:27, etc.
When I begin, I will also make an end - I will not delay the execution of my purpose: when I begin, nothing shall deter me from bringing all my judgments to a conclusion.