#brought his sack down

"lowered his sack"

#the oldest ... the youngest

The word "brother" is understood. AT: "the oldest brother ... the youngest brother" (See: [[:en:ta:vol2:translate:figs_ellipsis]])

#youngest, and the cup was found in Benjamin's sack

This can be translated as a new sentence and in active form. AT: "youngest. The steward found the cup in Benjamin's sack" (See: [[:en:ta:vol2:translate:figs_activepassive]])

#Then they tore their clothes

The word "they" refers to the brothers. Tearing clothes was a sign of great distress and sorrow. (See: [[:en:ta:vol2:translate:translate_symaction]])

#and returned

"and they returned"