Sforno on Genesis 37:13/ספורנו על בראשית ל״ז:י״ג

1הלא אחיך רועים בשכם?, Yaakov implied that it was not very far from their home to Shechem. [this seems a bit strange as it is about 100km by air, surely quite a distance for an unaccompanied young man of 17 to travel all by himself. Ed.]