Jer 7:25-26 Jer 25:4 Dan 9:6 Heb 1:1, Lk 24:25-27,44-47

God preached the gospel, that is, the coming Christ, through his prophets. (Jeremiah 7:25-26, Jer 25:4, Dan 9:6, Hebrews 1:1)

Jeremiah 7:25 Since the day that your fathers came forth out of the land of Egypt unto this day I have even sent unto you all my servants the prophets, daily rising up early and sending them: 26 Yet they hearkened not unto me, nor inclined their ear, but hardened their neck: they did worse than their fathers.

Jer 25:4 And the Lord hath sent unto you all his servants the prophets, rising early and sending them; but ye have not hearkened, nor inclined your ear to hear.

Dan 9:6 Neither have we hearkened unto thy servants the prophets, which spake in thy name to our kings, our princes, and our fathers, and to all the people of the land.

Hebrews 1:1 God, who at sundry times and in divers manners spake in time past unto the fathers by the prophets,

The prophets of God proclaimed the coming Christ. That Christ is Jesus. (Rev 10:7, Luke 24:25-27, 44-47)

Rev 10:7 But in the days of the voice of the seventh angel, when he shall begin to sound, the mystery of God should be finished, as he hath declared to his servants the prophets.

Luke 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, 46 And said unto them, Thus it is written, and thus it behooved Christ to suffer, and to rise from the dead the third day: 47 And that repentance and remission of sins should be preached in his name among all nations, beginning at Jerusalem.