To be kept holy  : Exodus  chapter 16, verses 23 to 36 - chapter 20, verses 8,9,10 & 11 - chapter 31, verse 16 .

      Question : Who gave man the authority to change the Sabbath from Saturday to Sunday , and when was it given ?  Since it wasn't God , and He alone has that authority ,  it was never given . So why do most of the Christine world worship and uphold Sunday as the Sabbath Day and not Saturday ? When you have the answer , you will also have the reason or understanding why that was done. God is Light , we must not walk in darkness, but in righteousness and in truth , for God will not have it anyother way .  Be blessed and walk in that Light , for it is the light of the world . Jesus is that Light , Aman