Matthew 12:8 - Coke's Commentary on the Holy Bible

For the Son of man is Lord, &c.— See on Mark 2:27-28. The expression even of the sabbath-day, και του σαββατου, certainly implies, that the sabbath was an institution of great and distinguished importance. It may perhaps also refer to that signal act of authority which Christ afterwards, by the ministry of his apostles, exerted over it in changing it from the seventh to the first day of the week.