וְשָׁמַרְתָּ֨ אֶת־הַמִּצְוָ֜ה וְאֶת־הַֽחֻקִּ֣ים וְאֶת־הַמִּשְׁפָּטִ֗ים אֲשֶׁ֨ר אָנֹכִ֧י מְצַוְּךָ֛ הַיּ֖וֹם לַעֲשׂוֹתָֽם׃ (פ)
Tu observeras donc la loi, et les décrets et les règles, que je t’ordonne en ce jour d’exécuter.
Rashi
היום לעשותם [WHICH I COMMANDED THEE] TO-DAY TO DO THEM — to do them to-day, but only in the time to come — in the future world — to receive the reward for them (Eruvin 22a).
Chizkuni
ושמרתם את המצוה, “You shall therefore keep the commandment;” your observing His commandments will be appropriate as a repayment for G-d keeping His promises to the forefathers.”
Ibn Ezra
Therefore keep Just as God keeps the covenant, so must you keep His commandments.