Mitzvah of Challah
The first part of Av is Menachem Av where we are comforting our father.And now, the roles reverse and Hashem is comforting us. We kick off the 2nd part of the month of Av with Shabbos Nachamu, the Shabbos after Tisha B’av. We read in the Haftorah this past Shabbos where it says, "be comforted, be comforted my nation." In the Midrash it says that when Jeremiah came to the Jewish people, and said "be comforted my nation", & they all wanted to stone him. They were so angry. They said, we are still in gulus, and don’t have a holy Temple.
Jeremiah continued, it is not me that is comforting you, it is coming from your GD! Hashem said, you are comforted because you are my nation, even during the tragedies and what you have to go through. I will always be there for you. You are not alone in all your pain. You are mine, you belong to me.