Daniel
Daniel 5:20ESV·traditional attribution

But when his heart was lifted up and his spirit was hardened so that he dealt proudly, he was brought down from his kingly throne, and his glory was taken from him.

Matthew Henry Presbyterian @wholebiblehenry

Here is, I. The information given to the king, by the queen-mother, concerning Daniel, how fit he was to be consulted in this difficult case. It is supposed that this queen was the widow of Evil-Merodach, and was that famous Nitocris whom Herodotus mentions as a woman of extraordinary prudence.

Commenting on Daniel 5:10-29

John Gill Reformed Baptist @doctorgill

But when his heart was lifted up, and his mind hardened it pride,.... When his heart was elated with his successes and victories, with the enlargement of his dominions, and with his grandeur and glory he had arrived unto; and his pride increased yet more, till he was strengthened and hardened in it: or, "to deal proudly" (u); and behave haughtily to God and man...

Adam Clarke Methodist @methodicalclarke

He was deposed from his kingly throne - Became insane; and the reins of government were taken out of his hands.