as i indicated in my previous replies, there is no record in the gospels or the epistles of Christ or the apostles teaching the church to keep sabbath days, and there is record that they did not teach Gentile believers to do so.
additionally the historical record is shows it was not a practice of the church.
so, if one of the 10 was not taught as a law for the church, then "the 10" was not taught.
born as a Jewish man under Moses, Jesus kept all of the requirements of the Law, and His followers also being Jews under the Law did also.
His gentile followers, not being under the Law, evidently did not.
Jesus taught the 10 Commandments specifically and generally throughout the NT.
He said obey the Commandments many times and He confirmed which Commandments in Jn. 15:10.
He also said that we should obey the hypocritical teachers of the Law, but not do as they do - as they did not obey anything.
Matt. 23:1-3
He also said in Matt. 5:19 that those who obey and teach the 10 Commandments (just as He did) were greatest in the Kingdom of Heaven.
He also said in Matt. 5:20 that a Christian's righteousness should exceed that of the hypocritical teachers of the Law who taught but did not obey the 10 Commandments which further teaches obedience to the Commandments. By this, He was declaring that those who don't even teach them have no chance at all of entering the Kingdom.
And, for the record, Jesus' followers and disciples were the first Christians, not Jews.
Jesus did not obey the Jewish Laws, He made fun of them repeatedly, and humiliated all those who pushed those Traditions of the Jewish Elders in public.