Hashem Tells Yirmiyah to Rouse the Avos
At the Churban, Hashem tells Yirmiyah that he feels no pain for His children, and sends him to wake Avraham, Yitzchak, Yaakov and Moshe from their graves, for they know how to cry.
In the introduction to Eichah Rabbah (Pesichta 24), the following incident is recounted:
At that time [of the destruction of the Beis HaMikdash], Hashem, as it were, was crying and saying, “Woe is Me for My house. My sons, where are you? My priests, where are you? Those who love Me, where are you?” . . . Then Hashem said to Yirmiyah, “I am like a father who prepared a wedding canopy for his only son, and his son died while under the canopy. And you have no pain for Me or My children? Go and rouse Avraham, Yitzchak, Yaakov, and Moshe from their graves, for they know how to cry.”