 A shorter version of the "Shema", composed of simply appears in the Torah service ("Seder K'riat HaTorah") and the "Kedushah" of the Musaf service for Shabbat.And the "Shema" and for some the "V'ahavta", are among the first prayers said upon arising and form the central prayer of the bedtime "Shema", said just before retiring for sleep.Reuven Hammer noted that  recorded what was in effect the first siddur, as a part of which priests daily recited the Ten Commandments and 

The commandment to love God in is reflected in which is in turn one of the six Psalms recited at the beginning of the Kabbalat Shabbat prayer service.