Genesis 37:34
And Jacob rent his clothes, and put sackcloth upon his loins, and mourned for his son many days.
And Jacob rent his clothes,.... 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 days sometimes signify; twenty two years, according to Jarchi, even until the time he went down to Egypt and saw him alive.