Musar su Genesi 14:15

There was a certain old man residing at the inn who used to rise every night at midnight to engage in study. It was for him that the innkeeper had devised this instrument. Rabbi Aba said, “Blessed is the Merciful One who directed us to this place!” And when midnight came they all arose to study… The innkeeper related to his two sons the idea mention earlier that the Holy One Blessed is He enters Gan Eden at midnight to delight with the righteous. He added, “It was with this in mind that David declared, ‘I will arise at midnight to acknowledge You.’ ” Rabbi Aba said, “Surely you have spoken well. But from where do you know this?” He explained, “So did I learn from another elder.” The innkeeper also told them, “At the beginning of the first hour of the night all the accusers of the lower world awaken and go wandering about the world. Then exactly at midnight the Holy One Blessed is He arouses Himself to enter Gan Eden, at which time these accusers are not to be found. “All the proceedings of the Heavenly court are carried out only at midnight, as it is stated [regarding Avraham’s battle with the four kings], “And the night was divided against them” (Bereishis 14:15). And it is stated [regarding the striking of the first born in Egypt], “And it was at midnight” (Shemos 12:29).