And she looked and saw the king standing by his pillar at the entrance. The officers and trumpeters were beside the king, and all the people of the land were rejoicing and blowing trumpets, while the singers with musical instruments were leading the praises. Then Athaliah tore her clothes and screamed, “Treason, treason!”
Here we have, I. The people pleased, Ch2 23:12, Ch2 23:13. When the king stood at his pillar, whose right it was to stand there, all the people of the land rejoiced to see a rod sprung out of the stem of Jesse, Isa 11:1.
Commenting on 2 Chronicles 23:12-21
behold, the king stood at his pillar at the entering in--The king's pillar was in the people's court, opposite that of the priests'. The young king, arrayed in the royal insignia, had been brought out of the inner, to stand forth in the outer court, to the public view. Some think that he stood on the brazen scaffold of Solomon, erected beside the pillar [see on Ch2 6:13].
And she looked, and, behold, the king stood at his pillar at the entering in, and the princes and the trumpets by the king: and all the people of the land rejoiced, and sounded with trumpets, also the singers with instruments of musick, and such as taught to sing praise. Then Athaliah rent her clothes, and said, Treason, Treason.