48 And awhen a stranger dwells with you andwants to 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 a native of the land. For no uncircumcised person shall eat it.
49aOne law shall be for the native-born and for the stranger who dwells among you.”
50 Thus all the children of Israel did; as the Lord commanded Moses and Aaron, so they did.
51aAnd it came to pass, on that very same day, that the Lord brought the children of Israel out of the land of Egypt baccording to their armies.
God made His covenant with Old Testament Israel, a type of the church (Galatians 6:16). God's focus and concern were overwhelmingly on them, and He dealt with other nations only as they came in contact with Israel. Though God makes provision in His law to accept non-Israelites who wanted to join Israel and worship the true God, He nowhere commands the Israelites to go out and make disciples of other nations. Rather, His approach is to attract outsiders by the example of obedient Israel being blessed by Him.
The Hebrew language lacks an exact equivalent to the Greek noun proselyte, which means a newcomer (Strong's #4339). However, in the Old Testament, God's law does allow the ger (Strong's #1616), usually rendered "stranger," to become a full-fledged citizen of Israel. To do this, he needed to become circumcised. Exodus 12:48 addresses this changing of belief system in reference to the Passover.
The stranger "wants to keep the Passover." There is no hint of God expecting Israel to seek converts among the heathen by actively preaching to—or, at—them. Here, there is no coercion, subtle or otherwise; the Gentile convert voluntarily gives himself to come under the Old Covenant. Deuteronomy 4:5-7 states the dynamics of this conversion.