Ex 10:2, Ex 12:25-27, Ex 13:14-15, Deut 32:7, Ps 78:3-6, Joel 1:3, 1 Cor 15:1-4, 2 Tim 3:15
In the Old Testament, the ancestors told the Israelites what God had done, so they could hear the gospel of God. (Psalms 44:1)
Psalms 44:1 We have heard with our ears, O God, our fathers have told us, what work thou didst in their days, in the times of old.
In the Old Testament, God brought the Israelites out of Egypt through the Passover lamb. (Ex 12:25-27, Ex 13:14-15)
Ex 12:25 And it shall come to pass, when ye be come to the land which the Lord will give you, according as he hath promised, that ye shall keep this service. 26 And it shall come to pass, when your children shall say unto you, What mean ye by this service? 27 That ye shall say, It is the sacrifice of the Lord's passover, who passed over the houses of the children of Israel in Egypt, when he smote the Egyptians, and delivered our houses. And the people bowed the head and worshipped.
Ex 13:14 And it shall be when thy son asketh thee in time to come, saying, What is this? that thou shalt say unto him, By strength of hand the Lord brought us out from Egypt, from the house of bondage: 15 And it came to pass, when Pharaoh would hardly let us go, that the Lord slew all the firstborn in the land of Egypt, both the firstborn of man, and the firstborn of beast: therefore I sacrifice to the Lord all that openeth the matrix, being males; but all the firstborn of my children I redeem.
In the Old Testament, God commanded us to pass on the works of God to his descendants. (Deuteronomy 32:7, Psalms 78:3-6, Joel 1:3)
Deuteronomy 32:7 Remember the days of old, consider the years of many generations: ask thy father, and he will shew thee; thy elders, and they will tell thee.
Psalms 78:3 Which we have heard and known, and our fathers have told us. 4 We will not hide them from their children, shewing to the generation to come the praises of the Lord, and his strength, and his wonderful works that he hath done. 5 For he established a testimony in Jacob, and appointed a law in Israel, which he commanded our fathers, that they should make them known to their children: 6 That the generation to come might know them, even the children which should be born; who should arise and declare them to their children:
Joel 1:3 Tell ye your children of it, and let your children tell their children, and their children another generation.
As recorded in the Old Testament, Christ Jesus died and rose again on the third day, and the gospel that Jesus is the Christ has been delivered to us. (1 Corinthians 15:1-4)
1 Corinthians 15:1 Moreover, brethren, I declare unto you the gospel which I preached unto you, which also ye have received, and wherein ye stand; 2 By which also ye are saved, if ye keep in memory what I preached unto you, unless ye have believed in vain. 3 For I delivered unto you first of all that which I also received, how that Christ died for our sins according to the scriptures; 4 And that he was buried, and that he rose again the third day according to the scriptures:
We must also communicate to our children that Jesus is the Christ throughout the Old and New Testaments. (2 Timothy 3:15)
2 Timothy 3:15 And that from a child thou hast known the holy scriptures, which are able to make thee wise unto salvation through faith which is in Christ Jesus.