2 Kings 11:13-14

13When Athaliah heard the sound of the guards and of the people, she went into the house of the Lord to the people.

14When she looked, behold, there stood the [young] king [on the platform] by the pillar, as was customary [on such occasions], and the captains and the trumpeters were beside the king; and all the people of the land rejoicing and blowing the trumpets. Then Athaliah tore her clothes and cried, “Treason! Treason!”