Genesis 37:34

“And Jacob rent his clothes, etc.] As expressive of his grief and mourning for the death of his son, as he supposed: and put sackcloth upon his loins; put off his usual apparel, and put on a coarse garment on his loins next to his flesh, as another token of his great trouble and affliction for the loss of his son; which though afterwards was frequently done in times of public or private mourning, yet this is the first time we read of it; whether Jacob was the first that used it, whom his posterity and others imitated, is not certain; however it appears that this usage, as well as that of rending clothes on sorrowful occasions, were very ancient: and mourned for his son many days: or years, as…”

“Jacob rent his clothes, and put sackcloth upon his loins--the common signs of Oriental mourning. A rent is made in the skirt more or less long according to the afflicted feelings of the mourner, and a coarse rough piece of black sackcloth or camel's hair cloth is wound round the waist.”

“- 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…”

“37:34-35 Jacob tore his clothes and dressed himself in burlap: These were signs of great distress and mourning (see 44:13; Job 1:20; 16:15). Jacob was devastated and refused to be comforted. The treachery thus affected everyone in his family.”