Not for teh gentiles who did not convert to Judaism.
Where is there in scripture anything requiring a conversion to Judaism? Conversion required always a return to God... The church in the OT was merely God's instrument in teaching and explaining the law and demonstrating the love of God... His character... To the world. The first and foremost thing for any one outside of Israel was to acknowledge the Good of Israel and keep His Commandments. You didn't
absolutely need Israel to do that.
KJV Isaiah 56:1-7
1 Thus saith the LORD, Keep ye judgment, and do justice: for my salvation is near to come, and my righteousness to be revealed.
2 Blessed is the man that doeth this, and the son of man that layeth hold on it;
that keepeth the sabbath from polluting it, and keepeth his hand from doing any evil.
3
Neither let the son of the stranger, that hath joined himself to the LORD, speak, saying, The LORD hath utterly separated me from his people: neither let the eunuch say, Behold, I am a dry tree.
4
For thus saith the LORD unto the eunuchs that keep my sabbaths, and choose the things that please me, and take hold of my covenant;
5 Even unto them will I give in mine house and within my walls a place and a name better than of sons and of daughters: I will give them an everlasting name, that shall not be cut off.
6
Also the sons of the stranger, that join themselves to the LORD, to serve him, and to love the name of the LORD, to be his servants,
every one that keepeth the sabbath from polluting it, and taketh hold of my covenant;
7 Even them will I bring to my holy mountain, and make them joyful in my house of prayer: their burnt offerings and their sacrifices shall be accepted upon mine altar;
for mine house shall be called an house of prayer for all people.
KJV Acts 13:42-44
42 And when the Jews were gone out of the synagogue, the Gentiles besought that these words might be preached to them the next sabbath.
43 Now when the congregation was broken up, many of the Jews and religious proselytes followed Paul and Barnabas: who, speaking to them, persuaded them to continue in the grace of God.
44 And the next sabbath day came almost the whole city together to hear the word of the Lord.