The Law that was given to Israel by God through the Prophet Moses exemplified its uniqueness as a nation before the pagan cultures (Deuteronomy 4:5-9; Isaiah 42:5-7). The Law even contained clauses regarding the proper treatment of outsiders, thereby demonstrating God's care for those who were not Jewish. He provides equally for both the Jew and the Gentile (Deuteronomy 10:16-21). The nations are in view through the seed of Abraham (Genesis 22:18). The Apostle Paul further elaborated on this truth as he was given new revelation from God (Ephesians 3:1-13). Non Jewish believers are considered as members of His heavenly kingdom in the same manner as a believing Jew.
Gentiles were saved in the Old Testament by converting to Judaism. They were saved by placing their trust in the God of Israel and identifying themselves with His people. False gods were forsaken for the worship of Yahweh. One noteworthy example of conversion is that of Rahab (Joshua 2). Another example of conversion is Ruth, which is described in detail in the first chapter of the book named after her. That Moabite woman exhibited faith in God and entered into His covenant, which consisted of trusting in the assurance of a future redeemer as foretold by the Holy Scriptures. The coming of a Messiah was believed by the patriarchs and of all the Jews. Converts partook in the Passover (Exodus 12:46-50). God has never been beyond the reach of individuals who truthfully seek after Him (Acts 17:26-27).