Берешит 49:5 Комментарий: Rashi, Chizkuni, Da'at Zekenim & Ramban

שמעון ולוי אחים SIMEON AND LEVI WERE BRETHREN in the plot against Shechem and against Joseph. Scripture states, (Genesis 37:19—20) “And they said one to another… (literally, one to his brother) come now therefore and let us slay him” (Midrash Tanchuma, Vayechi 9). Now, who were these? Should you say Reuben or Judah was one of them — but they were not consenting parties to slaying him (cf. Genesis 37:21, Genesis 37:22 and Genesis 37:26). Should you say they were the sons of the handmaids (Dan, Naphtali, Gad or Asher) — their hatred of Joseph was not so perfect a hatred that they would wish to kill him for it is said, (Genesis 37:2) “whilst a lad he used to be with the sons of Bilhah and with the sons of Zilpah etc.” Issachar and Zebulun would certainly not have spoken thus in the presence of their elder brothers. Consequently one must needs say that they were Simeon and Levi whom their father called “brethren” (Midrash Tanchuma, Vayechi 9).

שמעון ולוי אחים, “Shimon and Levi are full brothers.” This point is recorded by Yaakov to inform us that these two were always of the same mind, as opposed to the other brothers. However, while generally speaking, this is laudable, it could become dangerous when their wrath is aroused.

שמעון ולוי אחים, כלי חמס מכרותיהם, “Shimon and Levi are brothers, their kinship is the use they make of weapons.” Yaakov implied that whereas they had displayed their being brothers when avenging the rape of innocent Dinah, their sister, they had failed to do so in their treatment of Joseph, their brother. (B’reshit Rabbah,98,5 and 99,7)