Shulchan Arukh Even HaEzer · Siman 65

English

There is a commandment to delight a groom and bride and dance before them and tell them they are beautiful and kind. Even if they aren't pretty. Rem"a: We see rabbi Yehuda the son of allay was dancing before the bride and nullifying the words of the torah to enter the bride to the canopy.

English

It is forbidden to gaze at the bride. Rem"a: However it is permitted to gaze at her jewelry or head covering).

English

One needs to place ashes on the head of the bridegroom in the place where the tefillin sit in memory of the mourning of Jerusalem. As it says (Isiah 61:3) "To appoint unto them that mourn in Zion, To give unto them a garland for ashes". Rem"a: There are place where is it customary to break a glass after the sheva brachot [the blessing that make up erusin], and this is the tradition in our lands that the bridegroom breaks the utensil on which the blessings of erusin were said. Every place goes according to its traditions. There is also a tradition to fast. See also (siman 61). For the law of throwing food before the bride and bridegroom, see (Shulchan aruch, Orach Chayyim, 171).

English

A dead body [a burial procession] and a bride [bridal procession] which meet each other, the burial procession is moved from before the bridal procession to give her the road.