Moses
Leviticus 23:3BSB·traditional attribution

For six days work may be done, but the seventh day is a Sabbath of complete rest, a day of sacred assembly. You must not do any work; wherever you live, it is a Sabbath to the LORD.

Matthew Henry Presbyterian @wholebiblehenry

Here is, I. A general account of the holy times which God appointed (Lev 23:2), and it is only his appointment that can make time holy; for he is the Lord of time, and as soon as ever he had set its wheels a-going it was he that sanctified and blessed one day above the rest, Gen 2:3.

Commenting on Leviticus 23:1-3

John Gill Reformed Baptist @doctorgill

Six days shall work be done,.... Or may be done by men, any sort of lawful work and honest labour, for the sustenance of themselves and families: but the seventh day is the sabbath of rest; from all bodily labour and work of any kind; typical of rest by Christ and in him: an holy convocation; when the people were called to holy exercises, to...

Jamieson-Fausset-Brown Reformed @jfbcommentary

Six days shall work be done: but the seventh day is the sabbath of rest--(See on Exo 20:8). The Sabbath has the precedence given to it, and it was to be "a holy convocation," observed by families "in their dwellings"; where practicable, by the people repairing to the door of the tabernacle; at later periods, by meeting in the schools of the prophets, and in synagogues.