On Rosh Chodesh, Chanukah, and Purim, [they] may sing dirges and clap on any of these days, but they may not engage in [responsive] wailing.  Once the deceased is buried, they may neither sing dirges, nor clap.  What is meant by dirges? That all lament in unison. [And what is meant by] wailing? That one speaks and all others respond after her; as the verse states: And teach your daughters a lament and each woman [shall teach] her neighbor a wailing.  However, as regards the future, the verse states: He will destroy death forever, and my Lord, Hashem/Elohim, will wipe tears from upon every face [He will remove the shame of His people from the entire earth —- for Hashem has spoken].

All are obligated in re'iyah except for a deaf person, an imbecile, a minor, a person of undetermined sex, a hermaphrodite, women, slaves who have not been freed, the lame, the blind, the infirm, the aged, and one who is unable to ascend by foot.  Who is deemed a minor? Whoever cannot ride on his father's shoulders and ascend from Jerusalem to the Temple Mount —- [these are] the words of Beis Shammai.  Beis Hillel say: Whoever cannot hold his father's hand and ascend from Jerusalem to the Temple Mount, for the verse states: three pilgrimages (Exodus 23:14).