She looked, and, behold, the king was standing

"When she arrived, she was surprised to see King Joash standing"

by the pillar

"by one of the pillars of the temple"

"which was the usual place for the king to stand"

"the people who played the trumpets"

She tore her clothes to express that she was very upset and angry. (See: rc://en/ta/man/translate/translate-symaction)

"You are traitors! You have betrayed me!"