Divine Reward and Punishment for Minors

Principles of Reward & Punishment

Loss of Children, as a form of Divine punishment: Berachot 5a-b, Shabbat 105b

For Parents who are Rebellious against Hashem: Ketuvot 8b

For Parents who speak foul speech: Ketuvot 8b

For Parents who don't mourn the death of a good person: Shabbat 105b, Moed Katan 25a

Punishment of Children for their parents, in general: Berachot 7a

Punishment of Parents for sins of their children: Succah 56b