Ha'azinu: Chapter 36
The forehead of Zeir Anpin

We are told that whenever it is exposed, the forehead of Zeir Anpin takes revenge on the wicked for their deeds. However, when the forehead of Atika is revealed within the forehead of Zeir Anpin it is a time of goodwill for everyone; this happens during the Minchah service on Shabbat. Rabbi Shimon explains why people are not punished by a celestial court until they are at least twenty years old.