Sforno on Exodus 20:9/ספורנו על שמות כ׳:ט׳

1ששת ימים תעבוד, during those days you will give attention predominantly to mundane matters, most of which involve difficulties and frustrations seeing that such mundane matters concentrate on events in a world which is not ours.

2ועשית כל מלאכתך, the type of activities essential for earning one’s livelihood.