Parshas Vaera 5785

וָאֵרָא אֶל־אַבְרָהָם אֶל־יִצְחָק וְאֶל־יַעֲקֹב בְּאֵל שַׁדָּי וּשְׁמִי ה' לֹא נוֹדַעְתִּי לָהֶם׃ 

I appeared to Abraham, Isaac, and Jacob as El Shaddai, but I did not make Myself known to them by My name, Hashem.