וְעַל־שִׂכְל֗וֹ וְהִצְלִ֤יחַ מִרְמָה֙ בְּיָד֔וֹ וּבִלְבָב֣וֹ יַגְדִּ֔יל וּבְשַׁלְוָ֖ה יַשְׁחִ֣ית רַבִּ֑ים וְעַ֤ל־שַׂר־שָׂרִים֙ יַעֲמֹ֔ד וּבְאֶ֥פֶס יָ֖ד יִשָּׁבֵֽר׃
And through his cunning he shall cause craft to prosper in his hand; and he shall magnify himself in his heart, and in time of security shall he destroy many; he shall also stand up against the prince of princes; but he shall be broken without hand.
Read halakhic rulings (Jewish law) on Daniel 8:25: and classical halakhic sources.