Minimizing business, planting and Kidddushin/Wedding celebrations if two sets of fasts for rain go unanswered: Megillah 5b
Meal of the Wedding
The Sages were careful, for the Bride's Sake, to make the Groom prepare the wedding meal for at least 3 days: Ketuvot 2a, 3a-b
The Sages were careful, for the Bride's Sake, to make the Groom stay with his wife to gladden her for at least 3 days: Ketuvot 5a, 7a
Marrying, when the Groom's father or Bride's mother died that day: Ketuvot 3b-4a
What happens if the groom's father or bride's mother died on the day of the wedding, and the meal wouldn't be lost if the wedding was postponed: Ketuvot 4a
If a man marries off his son in a given house, it is assumed that he means to transfer ownership of that house to his son: Gittin 14a
One should be modestly secretive about helping fund a wedding: Succah 49b
Minimizing business, planting and Kidddushin/Wedding celebrations if two sets of fasts for rain go unanswered: Megillah 5b
Rabban Gamliel and Rabbi Yehoshua going to purchase an animal for Rabban Gamliel's son's wedding feast: Makkot 14a; Keritot 15a
Gladdening Bride and Groom
The true nature of gladdening the couple: Tos. Succah 25b #4
Prohibition against joining the Feast without gladdening the couple: Berachot 6b
Main reward comes from conversation with them: Berachot 6b
Reward of "5 Kolot" for participation: Berachot 6b
Gd making "Shushvinin" preparations for the wedding meal of Adam and Eve: Eruvin 18b
Making "Shushvinin" preparations to one's inferior: Eruvin 18b