Moses
Exodus 20:9ESV·traditional attribution

Six days you shall labor, and do all your work,

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

Six days shalt thou labour,.... This is not to be taken for a precept, but a permission; not as a command enjoining men to work and labour with their hands, to provide for themselves and families things useful and necessary, and honest in the sight of God; but as a grant and allowance of so many days to employ themselves in, for their own profit...

Adam Clarke Methodist @methodicalclarke

Six days shalt thou labor - Therefore he who idles away time on any of the six days, is as guilty before God as he who works on the Sabbath. No work should be done on the Sabbath that can be done on the preceding days, or can be deferred to the succeeding ones. Works of absolute necessity and mercy are alone excepted.