What men say of the Sabbath vs. what God says

But the seventh day is the sabbath of the LORD thy God: 

Exodus 20:10

"Some call the day of Christ’s resurrection the first day of the week;

others call it the day of the sun, and the eighth day; and a larger number call it the Lord’s day, but there are no examples of this application till the close of the second century. 

--Some enjoin the observance of both the Sabbath and the first day,

--while others treat the seventh day as despicable." 

J.N. Andrews