The Seventh Day
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Genesis 2:2
And by the seventh day God had finished the work He had been doing; so on that day He rested from all His work.
Genesis 2:3
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.
1 Corinthians 16:2
On the first day of every week, each of you should set aside a portion of his income, saving it up, so that when I come no collections will be needed.