18 But this is how God fulfilled what he had foretold through all the prophets, saying that his Messiah would suffer.

Read Acts 3:18 Using Other Translations

But those things, which God before had shewed by the mouth of all his prophets, that Christ should suffer, he hath so fulfilled.
But what God foretold by the mouth of all the prophets, that his Christ would suffer, he thus fulfilled.
But God was fulfilling what all the prophets had foretold about the Messiah—that he must suffer these things.