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Gentiles and the Law in the Old Testament
In the Old Testament, Gentiles—those not born into the tribes of Israel—were not excluded from God's covenant. In fact, when they chose to dwell among Israel or align themselves with the God of Israel, they were expected to follow His commandments. This was not based on tradition, but on direct instruction from God through Moses.One Law for All
God made it clear that His Law was not just for ethnic Israelites, but for anyone who joined themselves to the covenant community.
Exodus 12:48–49 says:
This passage shows that Gentiles who wished to participate in Israel’s worship had to undergo circumcision and follow the same laws as native Israelites.“And when a stranger shall sojourn with thee, and will keep the passover to the Lord, let all his males be circumcised, and then let him come near and keep it; and he shall be as one that is born in the land: for no uncircumcised person shall eat thereof. One law shall be to him that is homeborn, and unto the stranger that sojourneth among you.”
Leviticus 24:22 reinforces this:
Numbers 15:14–16 adds:“Ye shall have one manner of law, as well for the stranger, as for one of your own country: for I am the Lord your God.”
These verses confirm that Gentiles who lived among Israel and participated in worship were bound by the same ordinances.“And if a stranger sojourn with you, or whosoever be among you in your generations, and will offer an offering made by fire of a sweet savour unto the Lord; as ye do, so he shall do. One ordinance shall be both for you of the congregation, and also for the stranger that sojourneth with you...”
Examples of Gentiles Who Followed the Law
Several Gentiles in the Old Testament chose to align themselves with Israel and, by implication, submitted to God's commandments.
Rahab, in Joshua 2 and 6, was a Canaanite woman in Jericho who feared the God of Israel and protected the spies. She was spared during the conquest and lived among Israel afterward. Though Scripture doesn’t detail her observance of the Law, her inclusion in Israel and later in the lineage of Messiah (Matthew 1:5) suggests she embraced the covenant.
Ruth the Moabitess is another example. In Ruth 1:16, she says:
Ruth left her Moabite heritage and fully embraced Israel’s God and people. She married Boaz and became the great-grandmother of King David. Her story is a powerful example of a Gentile who joined Israel and was accepted into the covenant community.“Thy people shall be my people, and thy God my God.”
The “mixed multitude” mentioned in Exodus 12:38 also left Egypt with the Hebrews:
These were non-Israelites who joined the Exodus. They were subject to the same laws as Israelites (Exodus 12:49), indicating that their inclusion required obedience to God’s commandments.“And a mixed multitude went up also with them; and flocks, and herds, even very much cattle.”
The Gibeonites in Joshua 9 are another example. Though they deceived Israel into making a covenant, they were not cast out. Instead, they were made servants in the Tabernacle:
Their service at the altar implies they were brought under the religious life of Israel.“And Joshua made them that day hewers of wood and drawers of water for the congregation, and for the altar of the Lord...” (Joshua 9:27)
Ritual Washing in the Law
While later traditions added many washings, the Torah itself commands ritual washing in specific contexts. This is a little controversial, but many believe
this is where baptism originated.
Exodus 30:17–21 commands priests to wash their hands and feet before entering the Tabernacle:
Leviticus 15 outlines various bodily discharges and requires those affected to wash with water and remain unclean until evening.“So they shall wash their hands and their feet, that they die not.”
Numbers 19:11–12 says that anyone who touches a dead body must be purified with water on the third and seventh days.
These washings were not traditions—they were direct commandments from God, and they applied to anyone within the camp, including Gentiles who had joined Israel.
Conclusion
The Old Testament clearly teaches that Gentiles who joined themselves to Israel were expected to follow God's Law. This was not a matter of tradition, but of covenant obedience. Whether through circumcision, sacrificial participation, or ritual purity, Gentiles were held to the same standard as native Israelites. God's justice and holiness were not ethnically exclusive—they were covenantal and open to all who would submit to Him.
Now all of this is the Old testament.. but what about the New Testament?