Gevurot Meyruach Hakodesh 5:21

And having heard, the Moshiachʼs Shlichim entered the Beis Hamikdash at Shachrit and were saying shiurim. And when the Kohen Gadol and the ones with him had come, they called together the Sanhedrin and all the assembly of Zekenim of the Bnei Yisroel, and they sent to the beis hasohar for the prisoners to be brought to them.