Bible 13

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. And God blessed the seventh day and made it holy, because on it he rested from all the work of creating that he had done.

こうして、とてつもなく大きな世界の中で天と地球は完成した。神は7日目に今までの行動をやめた。7日目には全ての仕事をせず休んだ。そして神は7日目に全ての創造を祝福し、聖なる日、休息の日とした。

It is amazing that it had pasted only 7 days from earth wad created, God decided one week is 7 days as today.
今、使われている一週間は7日と定められたのは、地球が誕生した7日目のこと。