1 Samuel 3:12

12 In that day I establish unto Eli all that I have spoken unto his house, beginning and completing;

1 Samuel 3:12 Meaning and Commentary

1 Samuel 3:12

In that day I will perform against Eli all things which I have
spoken concerning his house
Or family, that is, by the man of God, ( 1 Samuel 2:27 ) as that he would cut off the strength of it, that there should not be an old man in it; and such as remained should be reduced to the utmost poverty and meanness; this shows that that prophecy was antecedent to this, contrary to the sense of some:

when I begin, I will also make an end;
not immediately, and at once, but by degrees; he began in the death of Hophni and Phinehas, and went on in the slaughter of Abimelech, and the eighty five priests at Nob, in the times of Saul, and finished in the thrusting out of Abiathar from the priesthood, in the times of Solomon, whereby that family was brought to disgrace and poverty.

1 Samuel 3:12 In-Context

10 And Jehovah cometh, and stationeth Himself, and calleth as time by time, `Samuel, Samuel;' and Samuel saith, `Speak, for Thy servant if hearing.'
11 And Jehovah saith unto Samuel, `Lo, I am doing a thing in Israel, at which the two ears of every one hearing it do tingle.
12 In that day I establish unto Eli all that I have spoken unto his house, beginning and completing;
13 and I have declared to him that I am judging his house -- to the age, for the iniquity which he hath known, for his sons are making themselves vile, and he hath not restrained them,
14 and therefore I have sworn to the house of Eli: the iniquity of the house of Eli is not atoned for, by sacrifice, and by offering -- unto the age.'
Young's Literal Translation is in the public domain.