"Then, they will teach their families – how to live for You. Six days You'll speak; then they will pray and praise at morn and night. On sabbath days, each week – they'll rest in You. Each year, they'll climb up more than fifty sabbath steps – from Earth, to Heaven's everlasting rest. Then, at the end – good men will rest with You in never-ending bliss!"
On their very first sabbath, our (then still sinless) first parents would have rested and worshipped God – all the day. When night would then have arrived, they would have worshipped God again – and thereafter slept.