Sforno on Leviticus 25:18/ספורנו על ויקרא כ״ה:י״ח

1ועשיתם את חקותי, the sh’mittah and Yovel legislation. ואת משפטי תשמרו, the social laws governing the sale and purchase of property in relation to the Yovel so that no cheating of any kind takes place.

2.וישבתם על הארץ לבטח. To ensure that you will not be exiled from your land. This is the opposite of the prospect discussed in 26,43, and Isaiah 56,17, both of which threaten exile for abuse of the above laws.