Fairly early in the gospel of John, it mentions that believers would later receive the Spirit, but that up to that time it had not been given to anyone, because Jesus hadn’t been “glorified” yet. Later in John, shortly before Jesus was arrested, he stated that he had to go away before “the Advocate” would come to his disciples. So it sounds like no one was ever given the Spirit until after Jesus died. Later, Paul says the Spirit has revealed insights about Christ to certain people like him, but not to anyone in any other generations.

But there are plenty of passages in the Bible before those, that indicate that people had already been given the Spirit, most of them having received it many generations before this. Or at least Christian translators like to make it look that way. And some of those people had insights into Christ, long before he was even born. Or at least that’s how Christians like to interpret their prophecies.