Moses
Leviticus 25:5ESV·traditional attribution

You shall not reap what grows of itself in your harvest, or gather the grapes of your undressed vine. It shall be a year of solemn rest for the land.

Matthew Henry Presbyterian @wholebiblehenry

The law of Moses laid a great deal of stress upon the sabbath, the sanctification of which was the earliest and most ancient of all divine institutions, designed for the keeping up of the knowledge and worship of the Creator among men; that law not only revived the observance of the weekly sabbath, but, for the further advancement of the honour of them, added the...

Commenting on Leviticus 25:1-7

John Gill Reformed Baptist @doctorgill

That which groweth of its own accord of thy harvest thou shalt not reap,.... That which sprung up of itself from grains of corn, shed in the harvest of the preceding year, without any ploughing or sowing; he might reap it, but not as at other times, the whole of it, and gather it as his own property, but only somewhat of it in common...

Geneva Bible Notes Reformed @genevanotes

That which groweth of its own accord of thy harvest thou shalt not reap, neither gather the grapes of thy vine undressed: [for] it is a year of rest unto the land. (b) Because of the corn that fell out of the ears the previous year. (c) Or, which you have separated from yourself, and consecrated to God for the poor.