Lk 24:25-27, 44-45, Mt 26:24, Acts 3:18, Acts 26:22-23, Acts 28:23

The Old Testament prophets diligently studied when Christ would suffer and be resurrected to save us. (1 Pt 1:10-11)

1 Pt 1:10 Of which salvation the prophets have enquired and searched diligently, who prophesied of the grace that should come unto you: 11 Searching what, or what manner of time the Spirit of Christ which was in them did signify, when it testified beforehand the sufferings of Christ, and the glory that should follow.

The Old Testament explains and prophesies about Christ. That Christ is Jesus. (Lk 24:25-27,44-45, Mt 26:24, Acts 3:18)

Lk 24:25 Then he said unto them, O fools, and slow of heart to believe all that the prophets have spoken: 26 Ought not Christ to have suffered these things, and to enter into his glory? 27 And beginning at Moses and all the prophets, he expounded unto them in all the scriptures the things concerning himself. 44 And he said unto them, These are the words which I spake unto you, while I was yet with you, that all things must be fulfilled, which were written in the law of Moses, and in the prophets, and in the psalms, concerning me. 45 Then opened he their understanding, that they might understand the scriptures,

Mt 26:24 The Son of man goeth as it is written of him: but woe unto that man by whom the Son of man is betrayed! it had been good for that man if he had not been born.

Acts 3:18 But those things, which God before had shewed by the mouth of all his prophets, that Christ should suffer, he hath so fulfilled.

Paul explained the Old Testament and testified that the Christ who was to come was Jesus. (Acts 26:22-23, Acts 28:23)

Acts 26:22 Having therefore obtained help of God, I continue unto this day, witnessing both to small and great, saying none other things than those which the prophets and Moses did say should come: 23 That Christ should suffer, and that he should be the first that should rise from the dead, and should shew light unto the people, and to the Gentiles.

Acts 28:23 And when they had appointed him a day, there came many to him into his lodging; to whom he expounded and testified the kingdom of God, persuading them concerning Jesus, both out of the law of Moses, and out of the prophets, from morning till evening.