We can trust the Bible!!
Exodus 20:8 - 11 8. Remember the sabbath day, to keep it holy. 9. Six days shalt thou labour, and do all thy work: 10. But the seventh day is the sabbath of the LORD thy God: in it thou shalt not do any work, thou, nor thy son, nor thy daughter, thy manservant, nor thy maidservant, nor thy cattle, nor thy stranger that is within thy gates: 11. For in six days the LORD made heaven and earth, the sea, and all that in them is, and rested the seventh day: wherefore the LORD blessed the sabbath day, and hallowed it.