Genesis 37:21

“And Reuben heard [it], etc.] Overheard what they said, not being in the consultation; perhaps knowing his temper and disposition to be more mild and gentle, and being the elder brother, might fear he would overrule matters against them, and therefore Simeon and Levi did not choose to have him in the debate; or he might be at some distance and entirely absent when the consultation was held, and their intention was reported to him by some of them: and he delivered him out of their hands; from slaying him; that is, he endeavoured to do it by proposing another scheme: and said, let us not kill him; or let us not smite the soul f1648; the dear soul, or take away life.”

“- Joseph Was Sold into Egypt 17. דתין dotayı̂n Dothain, “two wells?” (Gesenius) 25. נכאת neko't “tragacanth” or goat’s-thorn gum, yielded by the “astragalus gummifer”, a native of Mount Lebanon. צרי tsērı̂y “opobalsamum,” the resin of the balsam tree, growing in Gilead, and having healing qualities. לט loṭ, λῆδον lēdon, “ledum, ladanum,” in the Septuagint στακτή staktē. The former is a gum produced from the cistus rose. The latter is a gum resembling liquid myrrh. 36. פוטיפר pôṭı̂yphar Potiphar, “belonging to the sun.” The sketch of the race of Edom, given in the preceding piece, we have seen, reaches down to the time of Moses. Accordingly, the history of Jacob’s seed, which is…”

“37:21-24 Reuben was perhaps trying to get back into his father’s good graces (35:22) by exercising the leadership of the firstborn (cp. 42:22). Reuben succeeded in saving Joseph’s life, but he failed to earn his father’s favor (37:29-30).”