Rashi on Genesis 42:36/רש"י על בראשית מ״ב:ל״ו

1אתי שכלתם ME YE HAVE BEREAVED OF CHILDREN — The inference is that he suspected them of having slain or sold him (Simeon) as they had done to Joseph (Genesis Rabbah 91:9).

2שכלתם YE HAVE BEREAVED — any-one whose children are lost to him may be called (שכול) bereaved.