Context: While worship in the Temple in Jerusalem included musical instruments (2 Chronicles 29:25–27), traditional Jewish religious services in the Synagogue, both before and after the last destruction of the Temple, did not include musical instruments given the practice of scriptural cantillation. The use of musical instruments is traditionally forbidden on the Sabbath out of concern that players would be tempted to repair (or tune) their instruments, which is forbidden on those days. (This prohibition has been relaxed in many Reform and some Conservative congregations.) Similarly, when Jewish families and larger groups sing traditional Sabbath songs known as zemirot outside the context of formal religious services, they usually do so a cappella, and Bar and Bat Mitzvah celebrations on the Sabbath sometimes feature entertainment by a cappella ensembles. During the Three Weeks musical instruments are prohibited. Many Jews consider a portion of the 49-day period of the counting of the omer between Passover and Shavuot to be a time of semi-mourning and instrumental music is not allowed during that time. This has led to a tradition of a cappella singing sometimes known as sefirah music.

Question: On what day is using musical instruments not allowed? 
Answer: Sabbath

Question: In what style do Jewish families typically sing Sabbath songs?
Answer: a cappella

Question: What is a cappella music occasionally called among those of Jewish faith?
Answer: sefirah music

Question: How many days are counted between Passover and Shavuot?
Answer: 49

Question: What is part of the time between Passover and Shavuot thought to be?
Answer: a time of semi-mourning

Question: What Temple forbade the use of instruments?
Answer: Unanswerable

Question: What was included in tradition Jewish services in synagogues?
Answer: Unanswerable

Question: What is forbidden on the Sabbath because it was considered work?
Answer: Unanswerable

Question: What prhabition has been relaxed in many traditional Jewish congregations?
Answer: Unanswerable

Question: What type of music is forbidden during Passover?
Answer: Unanswerable

Question: What did traditional Jewish religious services in the Synagogue include?
Answer: Unanswerable

Question: What is forbidden in Jerusalem?
Answer: Unanswerable

Question: When do Jewish families use musical instruments when singing Sabbath songs?
Answer: Unanswerable

Question: During what time is zemirot prohibited?
Answer: Unanswerable

Question: What kind of entertainment happens on the Sabbath for zemirot?
Answer: Unanswerable