Moses
Exodus 20:8ESV·traditional attribution

“Remember the Sabbath day, to keep it holy.

John Calvin Reformed @genevareformer

Exodus 20:8. Remember the Sabbath-day. The object of this Commandment is that believers should exercise themselves in the worship of God; for we know how prone men are to fall into indifference, unless they have some props to lean on or some stimulants to arouse them in maintaining their care and zeal for religion.

Matthew Henry Presbyterian @wholebiblehenry

Here is, I. The preface of the law-writer, Moses: God spoke all these words, Exo 20:1. The law of the ten commandments is, 1. A law of God's making. They are enjoined by the infinite eternal Majesty of heaven and earth. And where the word of the King of kings is surely there is power. 2. It is a law of his own speaking.

Commenting on Exodus 20:1-11

John Gill Reformed Baptist @doctorgill

Remember the sabbath day, to keep it holy. By abstaining from all servile work and business, and from all pleasures and recreations lawful on other days, and by spending it in religious exercises, both internal and external. This the Israelites are bid to "remember", by observing it in such a manner, because this command had been given them before at the first time the manna...