Firstly, after the resurrection of Jesus Christ nowhere in the NT is the early church recorded as affirming the Saturday Sabbath. Quite contrary the early followers of Christ are recorded as gathering on the first day of the week "Sunday."
Secondly, only 9 of the "10 Commandments" are repeated in Scripture after Christ's finished work on cross in Whom we have the ultimate rest, restoration and liberation from sin! Can you take a guess which one is not repeated? Jesus Christ did not do away with the 4th Commandment, rather He is the fulfillment and One we have eternal rest in!
Col. 2:16; Rom. 14:5).
You better memorize those two Scriptures! You will be confronted with this in street evangelism, you will call upon these Scriptures, and you will be happy that you learned them!