Exodus 34:21

(21) The law of the Sabbath meets us at every turn in Exodus. It was so fundamental to the entire polity, that it naturally held a place in every section of the legislation. We have already found it (1) propounded at the giving of the manna (Exodus 16:22-30); (2) reasserted in the fourth commandment (Exodus 20:8-11); (3) introduced into the “Book of the Covenant” (Exodus 23:12); and (4) appended to the directions given for the construction of the Tabernacle (Exodus 31:13-17).

In earing time and in harvest thou shalt rest.—“Earing-time” is ploughing time, “to ear” being an old English verb, etymologically connected with the Greek ἄρω and the Latin aro. (Comp. Genesis 45:6; Deuteronomy 21:4; 1 Samuel 8:12; Isaiah 30:24.) There was a special temptation to trench on the Sabbatical rest at the times most critical in respect to agricultural operations.