Acts 3:18

18 and God, what things before He had declared through the mouth of all His prophets, that the Christ should suffer, He did thus fulfil;

Acts 3:18 Meaning and Commentary

Acts 3:18

But those things which God before had showed
In the Scriptures of the Old Testament, concerning the betraying of the Messiah, and his sufferings and death, with the various causes, concomitants, and circumstances of them: by the mouths of all his prophets;
which were since the world began; some pointing out one thing or circumstance, and some another: that Christ should suffer.
The Vulgate Latin and Syriac versions read, "that his Christ should suffer"; but then they leave out the word "his" in the preceding clause, which they put into this; and this entire clause is omitted in the Alexandrian copy: he hath so fulfilled;
in the manner he has, so exactly, so perfectly agreeable to the predictions of them, and yet were unknown to the persons by whom they were fulfilled. So wisely and surprisingly are things ordered and overruled by the wise providence of God, who is a God of knowledge, and by whom all actions are weighed.

Acts 3:18 In-Context

16 and on the faith of his name, this one whom ye see and have known, his name made strong, even the faith that [is] through him did give to him this perfect soundness before you all.
17 `And now, brethren, I have known that through ignorance ye did [it], as also your rulers;
18 and God, what things before He had declared through the mouth of all His prophets, that the Christ should suffer, He did thus fulfil;
19 reform ye, therefore, and turn back, for your sins being blotted out, that times of refreshing may come from the presence of the Lord,
20 and He may send Jesus Christ who before hath been preached to you,
Young's Literal Translation is in the public domain.