The seventh day he rested from all his work.

 Genesis 1:26-2:3

Then God said, “Let us make mankind in our image, in our likeness, so that they may rule over the fish in the sea and the birds in the sky, over the livestock and all the wild animals, and over all the creatures that move along the ground.”

So God created mankind in his own image, in the image of God he created them; male and female he created them.

God blessed them and said to them, “Be fruitful and increase in number; fill the earth and subdue it. Rule over the fish in the sea and the birds in the sky and over every living creature that moves on the ground.”

God saw all that he had made, and it was very good. And there was evening, and there was morning—the sixth day. Thus the heavens and the earth were completed in all their vast array. By the seventh day God had finished the work he had been doing; so on the seventh day he rested from all his work.

Why?

The Lord created the earth and human and all universal, then rested from all his work on the seventh day.

The first Human being is created in the image of God. and let man manage all other creatures.

We should let seven day rest to serve and meditate the job of the Lord.

How?

We have the image of the Lord so we should work with the Lord and manage this environment better and beautifully keep the state when the Lord created.