Passage
In that day I will perform against Eli all that I have spoken concerning his house; I will begin and make an end.
In that day I will perform against Eli all that I have spoken concerning his house; I will begin and make an end.
1 Samuel 3:10 And Jehovah came, and stood, and called as at the other times, Samuel, Samuel! And Samuel said, Speak, for thy servant heareth.
1 Samuel 3:11 And Jehovah said to Samuel, Behold, I do a thing in Israel, at which both the ears of every one that heareth it shall tingle.
1 Samuel 3:12 In that day I will perform against Eli all that I have spoken concerning his house; I will begin and make an end.
1 Samuel 3:13 For I have declared to him that I will judge his house for ever, for the iniquity which he hath known: because his sons made themselves vile, and he restrained them not.
1 Samuel 3:14 And therefore I have sworn unto the house of Eli that the iniquity of Eli's house shall not be expiated with sacrifice or oblation for ever.
The verse centers on "perform", "against", "spoken", "concerning", "house", "begin", and "make". It is saying that the verse draws attention to "perform" and "against", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 11's "And Jehovah said to Samuel Behold I..." into verse 13's "For I have declared to him that...", so "perform" and "against" belong inside that flow. In 1 Samuel context, the local focus is covenant, worship, and faithfulness.
A plain takeaway is to answer the verse's own emphasis on "perform" and "against" with trust shaped by these words, not by a vague optimism outside the passage.