Haman
בראשית כה,ל: וַיֹאמֶר עֵּשָו אֶל־יַעֲקֹב הַלְעִיטֵּנִי נָא מִן־הָאָדֹם הָאָדֹם הַזֶה
The Baal HaTurim writes that the phrase "Haliteini Noh Min" - Feed me now from - The first letters of these three words spell HaMaN. This is an allusion to the halacha in Shulchan Aruch O.Ch. 695:2 that one should drink wine and eat seeds at the Purim meal. (see Rambam hilchos Kila'im 1:8 who says that "adashim" are considered seeds)
This allusion about Haman also teaches that just as Yaacov acquired Esav’s birthright for bread and lentils, so too Mordechai acquired Haman as a slave for a piece of bread (see Agaddas Esther 5:9). In the time of Ezra when they were rebuilding the wall of Yershalayim, the enemies claimed the Jews did not have permission. They agreed to select one member of each group to go to the King to clarify the issue. The Jews selected Mordachai and the enemies selected Haman. On the way the righteous Mordechai ate his bread little by little; however, Haman ate carelessly and ran out of bread. Haman pestered Mordechai for some of his bread. Finally, Mordechai he would give him bread fi Haman would sell himself to Mordechai as a slave. Haman agreed. Since they did not have a parchment on which to write the agreement, Haman signed the agreement written on Mordechai’s shoe.
Avrohom Kept Torah
בראשית כו, ה: עֵּקֶב אֲשֶר־שָמַע אַבְרָהָם בְקֹלִי וַיִשְמֹר מִשְמַרְ תִּי מִצְוֹתַי חֻקּוֹתַי וְתוֹרֹתָי :
The Baal haTurim points out that this Pasuk contains ten words, hinting at the Ten Commandments. Moreover, the Ten Commandments contain a hundred and seventy-two letters, which in turn, is equivalent to the Gematriyah of "Eikev").
The Gematriyah of these four words עקב אשר שמע אברהם is equivalent to that of 'Kiyem af eiruvei tavshilin' (he even kept Eiruv Tavshilin' as Chazal point out, based on this very Pasuk). The Gemara (Yoma 28b) derives from the word תורתי the Avrohom observed both the Written and the Oral Torah.
Five Signs of Kashrus
בראשית כז, ג: וְעַתָּה שָא־נָא כֵּלֶיךָ תֶּלְיְךָ וְקַשְתֶּךָ וְצֵּא הַשָדֶה וְצוּדָה לִי צָיִדה
The Baal haTurim points out that the "Tzayid" is a K'ri K'siv, which is spelled with an extra 'Hey' צידה. The extra letter equals five which hints at -
a. The five things that invalidate Shechitah - Shehiyah (pausing), D'rasah (pressing the knife downwards), Chaladah (covering the knife), Hagramah (Shechting outside the Shechitah area), & Ikur (tearing out the Simanim).
b. The five signs of a Kasher bird - It does not hold its prey down whilst eating it, it has an extra claw, it possesses a crop (where it stores its food), its maw can easily be peeled, and it does not divide its claws when standing on a rope.
c. The five signs of a Kasher Chayah - its hooves are completely split, it chews its cud, it does not have upper-teeth, it has horns, and the skin of its rump runs crisscross.
Mastermind
בראשית כז,לג: וַיֶחֱרַד יִצְחָק חֲרָדָה גְדֹלָה עַד־מְאֹד וַיֹאמֶר מִי־אֵּפוֹא הוּא הַצָד־צַיִד
The Baal haTurim notes that the first letters of "Va'yomer Mi Eifoh" spell backwards forms the word אמו 'Imo', his mother. It seems that Yitzchak guessed the mastermind behind the plot.
