The obligation in Jewish law () for mourners to perform is derived inferentially from the instruction given to
Aaron and his surviving sons following the deaths of
Nadab and Abihu: "Do not bare your heads and do not rend your clothes, lest you die...". From this specific prohibition applied to the priests officiating at that moment,
the Sages deduced that other mourners are indeed obligated to perform for their close relatives. However, according to most
Rishonim, the obligation of is generally considered a Rabbinic enactment () rather than a direct commandment from the Torah. The ritual has specific requirements: • It must be performed while standing. • The tear should be at least one
tefach (a handbreadth, approximately 8–10 cm or 3–4 inches) in length. • Tearing excessively beyond what is required is discouraged, as the Sages stated it could violate the prohibition of wanton destruction (). • An exception applies when mourning a parent (father or mother), for whom one must make a larger tear, symbolically described as tearing "until revealing the heart" (meaning tearing further down over the chest area, near the heart). • The tear is made on the uppermost garment being worn at the time. • It must be made on the front of the garment, near the neckline. • The tear must be made vertically (from the neckline downwards), not horizontally. According to the primary halakha (), the ideal time for is at the moment of death ( – 'the departure of the
soul'). However, common practice is often to perform it later. Sometimes it is done just before the body is removed from the home for
burial, but very frequently it is performed at the cemetery at the commencement of the funeral service. Often, a member of the or the officiating rabbi will assist the mourners in performing correctly (a woman assists female mourners to ensure privacy). Beyond the seven close relatives, halakha technically requires anyone present at the exact moment of a Jew's death to perform as well, although it is common practice nowadays to be lenient regarding this requirement for bystanders. The
Talmud also mandates performing upon hearing of the death of a prominent Torah scholar (). However, Rabbi
Moses Isserles (the , a key codifier of
Ashkenazi practice) notes that the prevailing custom became more lenient, generally restricting this obligation to performing only for one's primary, most significant Torah teacher (). == References ==