The king threw them in/into the 'dungeon'.
(..) because he's years old. Sent me with an army to the Riverlands and a siege that could last months. Better you're elsewhere at the head of an army than in the sept dungeons. I'm not going to the Riverlands. What, then? I'm going to give Bronn the largest bag of gold anyone's ever seen (..)2016 TvShow: Game of Thrones Title: Blood of My Blood Season: 6 Episode 6
(..) The Crown's decision on this matter is final. Will I be walking naked in the streets? Or will I spend a few months in the sept dungeons first to teach me about the gods' mercy? You have served your house and your king faithfully for many years. And you will continue to do so. But not in this city. (..)2016 TvShow: Game of Thrones Title: Blood of My Blood Season: 6 Episode 6