Chapter 13:23 “From the descendants of this man, according to promise, God has brought to Israel a Savior, Jesus.
Chapter 13:24 after John had proclaimed before His coming a baptism of repentance to all the people of Israel.
Chapter 13:25 And while John was completing his course, he kept saying, ‘What do you suppose that I am? He. But behold, one is coming after me the sandals of whose feet I am not worthy to untie.’
Chapter 13:26 “Brethren, sons of Abraham’s family, and those among you who fear God, to us the message of this salvation has been sent.
Paul, thus far has traced the history of the people of Israel from their time in Egyptian bondage until the time of King David. He left out their history from Solomon to Malachi but with the word, God, he brought together the name of Jesus together with the covenant that God made with David in II Samuel 7:8-17. Paul was using this history lesson to convince the Jews to let them know the true identity of Jesus of Nazareth, in that He was the seed of David. In verses 24 and 25, we see the first messenger of the Covenant, John the Baptist preach the gospel of repentance as the forerunner of Jesus Christ. And also in verse 25, we see, John the Baptist, let them know that Jesus was coming and in the next verse that Jesus was coming with the message of salvation. See in verse 26 also, that Paul calls the people brethren to identify himself with the people of Israel. He is ready to preach the gospel to all including Gentiles, proselytes and everyone who could hear his voice.