God placed the Ten Commandments for a particular reason and these Mosaic laws spoken by God that Christ viewed in verse 13 were not be nullified or voided. It is just that simple if you wish to follow God’s laws so that your days will be long.
God knew well in advance that as our earth became more populated that each of us need a day for rest from laboring for our bodies and our mind. God did not stop there as he said that animals need their rest from laboring six days and that our lands that we cultivate need rest both on the seventh day and seventh year.
Here’s a question—Have your read your Bible daily? Do you begin reading in the daytime, mid-day or nightly or all three times of the day? I read a chapter each morning to get my day started and I am enlightened by each word that was written.