וּשְׁמַרְתֶּ֤ם אֶת־כָּל־חֻקֹּתַי֙ וְאֶת־כָּל־מִשְׁפָּטַ֔י וַעֲשִׂיתֶ֖ם אֹתָ֑ם אֲנִ֖י יְהוָֽה׃ (פ)
Observez donc toutes mes lois et tous mes statuts, et accomplissez-les: je suis l’Éternel."
Sforno
ושמרתם את כל חקותי ואת כל משפטי, study them so that you will become aware of how fair they are.
Chizkuni
ושמרתם את כל חקתי, “you are to meticulously observe all My statutes;” this was repeated here once more as it sums up the chapter.
Ibn Ezra
you must keep My decrees and My rational precepts in your hearts, and you must obey them in practice. I am God i.e., you must pursue the fulfillment of the precepts which I have given you, for they are entirely just.