“I, My covenant is hereby with you, and you will be the father of a multitude of nations” (Genesis 17:4). “I, My covenant is hereby with you” – Rabbi Abba, Rabbi Berekhya, and Rabbi Shmuel bar Ami were sitting and encountering difficulty in determining: From where in the Torah is the use of acronyms derived?31From where is it derived that this is an acceptable form of exegesis? It is as it is stated: “The father of a multitude of nations [Av hamon goyim]” – av ham, which is missing the letter reish.32Abraham is an acronym for av hamon. The reish of “Abraham” is a remnant from his original name, Abram.