John Wesley on Leviticus 25:2

When ye come into the land - So as to be settled in it; for the time of the wars was not to be accounted, nor the time before Joshua's distribution of the land among them. Keep a sabbath - That is, enjoy rest and freedom from plowing, and tilling. Unto the Lord - In obedience and unto the honour of God. This was instituted, For the assertion of God's sovereign right to the land, in which the Israelites were but tenants at God's will. For the trial of their obedience. For the demonstration of his providence as well in general towards men, as especially towards his own people. To wean them from inordinate love, and pursuit of worldly advantages, and to inure them to depend upon God alone, and upon God's blessing for their subsistence. To put them in mind of that blessed and eternal rest provided for all good men.