Renting the garment is an eastern token of great distress. Genesis 37:29.
Related Commentaries of Genesis 44:10
Genesis 44:10-13
10 And he said, Now also let it be according unto your words: he with whom it is found shall be my servant; and ye shall be blameless.
11 Then they speedily took down every man his sack to the ground, and opened every man his sack.
12 And he searched, and began at the eldest, and left at the youngest: and the cup was found in Benjamin's sack.
13 Then they rent their clothes, and laded every man his ass, and returned to the city.