Pirkeiy Derebbe Eliezer
Sayings of the Sages:
Rav Tzadok stated: Whoever does not say Havdala over wine on Motzei Shabbos or does not hear Havdala from others does not see a Siman Bracha. However one who does say Havdala over wine on Motzei Shabbos Hashem calls him Kadosh and calls him a Segula, and separates him from the other nations.
Rebbe Yochanan states: Three inherit the world to come; one who lives in Eretz Yisrael; one who brings up his children to Torah; one who says Havdala over wine.
Rebbe Chiya Bar Rebbe Aba stated in the name of Rebbe Yochanan: Whoever says Havdala over wine on Motzei Shabbos merits having male children. Rebbe Yehoshua Ben Levi says he merits children which are fit to be Rabbis.