The Sabbath: Grounds of Its Institution
Source: TTT
Genesis 2:2, 3
And by the seventh day God had finished the work He had been doing; so on that day He rested from all His work. / Then God blessed the seventh day and sanctified it, because on that day He rested from all the work of creation that He had accomplished.
Exodus 20:11
For in six days the LORD made the heavens and the earth and the sea and all that is in them, but on the seventh day He rested. Therefore the LORD blessed the Sabbath day and set it apart as holy.