Where did you find this? You will have to show from the OT this is the way to be saved. If you can't find it, I will show you how they were saved.
I found it in all that Paul wrote about what he preached about.
Moses and the Prophets regarding salvation through faith in Christ
Luke 24:27, 44 -
27 And beginning with Moses and all the Prophets, he explained to them what was said in all the Scriptures concerning himself.
44 He said to them, “This is what I told you while I was still with you: Everything must be fulfilled that is written about me in the Law of Moses, the Prophets and the Psalms.”
Luke 16:29,30,31 -
29 “Abraham replied, ‘They have Moses and the Prophets; let them listen to them.’
30 “ ‘No, father Abraham,’ he said, ‘but if someone from the dead goes to them, they will repent.’
31 “He said to him, ‘If they do not listen to Moses and the Prophets, they will not be convinced even if someone rises from the dead.’ ”
John 1:45 - Philip found Nathanael and told him, “We have found the one Moses wrote about in the Law, and about whom the prophets also wrote—Jesus of Nazareth, the son of Joseph.”
John 5 -
39 You study the Scriptures diligently because you think that in them you have eternal life. These are the very Scriptures that testify about me,
40 yet you refuse to come to me to have life.
45 “But do not think I will accuse you before the Father. Your accuser is Moses, on whom your hopes are set.
46 If you believed Moses, you would believe me, for he wrote about me.
47 But since you do not believe what he wrote, how are you going to believe what I say?”
John 6:45 - It is written in the Prophets: ‘They will all be taught by God.’Everyone who has heard the Father and learned from him comes to me.
John 12:34 - The crowd spoke up, “We have heard from the Law that the Messiah will remain forever, so how can you say, ‘The Son of Man must be lifted up’? Who is this ‘Son of Man’?”
John 20:9- (They still did not understand from Scripture that Jesus had to rise from the dead.)
Acts 3:22,23,24 -
22 For Moses said, ‘The Lord your God will raise up for you a prophet like me from among your own people; you must listen to everything he tells you.
23 Anyone who does not listen to him will be completely cut off from their people.’
24 “Indeed, beginning with Samuel, all the prophets who have spoken have foretold these days.
Acts 9:22 - Yet Saul grew more and more powerful and baffled the Jews living in Damascus by proving that Jesus is the Messiah. [obviously from the OT]
Acts 10:43 - All the prophets testify about him that everyone who believes in him receives forgiveness of sins through his name.”
Acts 13:27, 29 - 27 -The people of Jerusalem and their rulers did not recognize Jesus, yet in condemning him they fulfilled the words of the prophets that are read every Sabbath. 29 - When they had carried out all that was written about him, they took him down from the cross and laid him in a tomb.
Acts 13:39 - Through him everyone who believes is set free from every sin, a justification you were not able to obtain under the law of Moses.
Acts 15:5,10 -
5 Then some of the believers who belonged to the party of the Pharisees stood up and said, “The Gentiles must be circumcised and required to keep the law of Moses.”
10 Now then, why do you try to test God by putting on the necks of Gentiles a yoke that neither we nor our ancestors have been able to bear? [this shows that the Law of Moses didn’t save]
Acts 17:2,3,11 -
2 As was his custom, Paul went into the synagogue, and on three Sabbath days he reasoned with them from the Scriptures,
3 explaining and proving that the Messiah had to suffer and rise from the dead. “This Jesus I am proclaiming to you is the Messiah,” he said.
11 Now the Berean Jews were of more noble character than those in Thessalonica, for they received the message with great eagerness and examined the Scriptures every day to see if what Paul said was true.
Acts 18:28 - For he vigorously refuted his Jewish opponents in public debate, proving from the Scriptures that Jesus was the Messiah.
Acts 24:14,24 -
14 However, I admit that I worship the God of our ancestors as a follower of the Way, which they call a sect. I believe everything that is in accordance with the Law and that is written in the Prophets,
24 Several days later Felix came with his wife Drusilla, who was Jewish. He sent for Paul and listened to him as he spoke about faith in Christ Jesus.
Acts 26:6,7,22,23 -
6 And now it is because of my hope in what God has promised our ancestors that I am on trial today.
7 This is the promise our twelve tribes are hoping to see fulfilled as they earnestly serve God day and night. King Agrippa, it is because of this hope that these Jews are accusing me.
22 But God has helped me to this very day; so I stand here and testify to small and great alike. I am saying nothing beyond what the prophets and Moses said would happen—
23 that the Messiah would suffer and, as the first to rise from the dead, would bring the message of light to his own people and to the Gentiles.”
Acts 28:23 - They arranged to meet Paul on a certain day, and came in even larger numbers to the place where he was staying. He witnessed to them from morning till evening, explaining about the kingdom of God, and from the Law of Moses and from the Prophets he tried to persuade them about Jesus.
Rom 1:2 - the gospel he promised beforehand through his prophets in the Holy Scriptures
Rom 3:20-22 -
20 Therefore, no one will be declared righteous in His sight by observing the law; rather, through the law we become conscious of sin.
21 But now apart from the law the righteousness of God has been made known, to which the Law and the Prophets testify.
22 This righteousness is given through faith in Jesus Christ to all who believe. There is no difference between Jew and Gentile,
Rom 3:27,28
27 Where, then, is boasting? It is excluded. Because of what law? The law that requires works? No, because of the law that requires faith.
28 For we maintain that a person is justified by faith apart from the works of the law.
All these verses support my views and refute your views.
When the verse mentions "Scripture" it obvious means the OT, since Paul wrote most of the NT.
