וּֽבְאַחֲרִית֙ מַלְכוּתָ֔ם כְּהָתֵ֖ם הַפֹּשְׁעִ֑ים יַעֲמֹ֛ד מֶ֥לֶךְ עַז־פָּנִ֖ים וּמֵבִ֥ין חִידֽוֹת׃
And in the latter time of their kingdom, when the transgressors have completed their transgression, there shall stand up a king of fierce countenance, and understanding stratagems.
Read halakhic rulings (Jewish law) on Daniel 8:23: and classical halakhic sources.