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Use in Jewish ritual

The Mishna records that during the period of the Second Temple, the Ten Commandments were recited daily, before the reading of the Shema Yisrael (as preserved, for example, in the Nash Papyrus, a Hebrew manuscript fragment from 150 to 100 BC found in Egypt, containing a version of the Ten Commandments and the beginning of the Shema); but that this practice was abolished in the synagogues so as not to give ammunition to heretics who claimed that they were the only important part of Jewish law, or to dispel a claim by early Christians that only the Ten Commandments were handed down at Mount Sinai rather than the whole Torah.

In later centuries rabbis continued to omit the Ten Commandments from daily liturgy in order to prevent confusion among Jews that they are only bound by the Ten Commandments, and not also by many other biblical and Talmudic laws, such as the requirement to observe holy days other than the sabbath.

However, some rabbinic authorities still recommend reading the Ten Commandments privately as part of unscheduled, non-communal prayer. The Ten Commandments are included in some prayerbooks for this purpose.

Today, the Ten Commandments are heard in the synagogue three times a year: as they come up during the readings of Exodus and Deuteronomy, and during the festival of Shavuot. The Exodus version is read in parashat Yitro around late January–February, and on the festival of Shavuot, and the Deuteronomy version in parashat Va'etchanan in August–September. In some traditions, worshipers rise for the reading of the Ten Commandments to highlight their special significance though many rabbis, including Maimonides, have opposed this custom since one may come to think that the Ten Commandments are more important than the rest of the Mitzvot.

In printed Chumashim, as well as in those in manuscript form, the Ten Commandments carry two sets of cantillation marks. The ta'am 'elyon (upper accentuation), which makes each Commandment into a separate verse, is used for public Torah reading, while the ta'am tachton (lower accentuation), which divides the text into verses of more even length, is used for private reading or study. The verse numbering in Jewish Bibles follows the ta'am tachton. In Jewish Bibles the references to the Ten Commandments are therefore Exodus 20:2–14 and Deuteronomy 5:6–18.