קבלה אויף שמות 14:29

What you must therefore know is that our forefather Avraham sought those waters, and that this is the mystery of the wells that were dug by our forefather Avraham, peace be upon him. Now, in those Upper Waters-Mayim HaElyonim-מים העליונים, our forefather Avraham, peace be upon him, built seventy-two bridges (Ayin-Beit Gesharim-ע״ב גשרים),³⁰⁴See Pardes Rimonim, Shaar 21 (Shaar Pratey HaShemot), Chapter 5. Rabbi Nechunia Ben HaKanah (Sefer HaBahir) calls HaShem’s-יהו״ה name of 72 by the term “the 72 Bridges.” This refers to the name that arises from the three verses that begin with the words, “VaYisa-ויסע, VaYavo-ויבא, VaYeit-ויט” (Exodus 14:19-21). Each of these verses possess 72 letters, and they combine into 72 three letter combinations, made up of the letters of these three verses. This name is a name of Kindness, as indicated by the fact that the numerical value of 72 is Kindness-Chessed-חסד-72. However, it is expressed through the vehicle and vessels of might-Gevurah, as indicated by the fact that the numerical value of 3 verses x 72 letters, equals 216, which is the numerical value of might-Gevurah-גבורה-216. Also see Ginat Egoz of Rabbi Yosef Gikatilla, translated as HaShem Is One, Vol. 3, The Gate explaining that the Explicit Name (Shem HaMeforash) is ע״ב-72 and יר״ו-216; also see Shaar HaYichud of Rabbi Dovber of Lubavitch, translated as The Gate of Unity, Ch. 22. by which the children of Israel traversed “the sea-HaYam-הים on dry land-Yabashah-יבשה; and the water-HaMayim-המים was a wall for them on their right and on their left.”³⁰⁵Exodus 14:22, 14:29 This is the secret of the three verses,³⁰⁶Exodus 14:19-21 “And he traveled-VaYeesa-ויסע,” “And he came-VaYavo-ויבא,” “And he stretched out-VaYeit-ויט.” The sign of each of these consecutive verses is that they each possess ע״ב-72 letters, and from their combinations, ע״ב-72 names arise, which are the kindness-Chessed-חסד-72 of Avraham. That is, the numerical value of kindness-Chessed-חסד is ע״ב-72. Now, because the waters are under the dominion of the banner of Avraham, Avraham made seventy-two bridges (Ayin-Beit Gesharim-ע״ב גשרים) over them, and woven within those bridges are all the titles of kindness-Chessed-חסד engraved on the banner of E”l-א״ל.