Praise God, all nations… (Psalms 117:1)
Midrash: Rabbi Tanchum Bar Chiya said: A day of rain is greater than the day on which the Torah was given. For the giving of the Torah brought joy to the Israelites, whereas a day of rain brings joy to all nations and to the entire world, including beasts, animals, and birds (Midrash Shochar Tov, Tehillim 17).