Ex 20:11 -
" For in six days the LORD made the heavens and the earth, the sea and all that is in them, and rested on the seventh day; therefore the LORD blessed the sabbath day and made it holy.
Too many have restricted Gods words to what is and isn't in the Bible. The Bible is a human compilation of works that met the canon of Constantine and Council of Nicene. Many valid works were rejected and questionable works included to achieve Constantine's requirements of a faith that would allow him to cement control of a fracturing empire. Constantine was a pagan after all.