הָרִֽאשֹׁנ֖וֹת הִנֵּה־בָ֑אוּ וַֽחֲדָשׁוֹת֙ אֲנִ֣י מַגִּ֔יד בְּטֶ֥רֶם תִּצְמַ֖חְנָה אַשְׁמִ֥יע אֶתְכֶֽם׃ (פ)
Behold, the former things are come to pass, And new things do I declare; Before they spring forth I tell you of them.
Read halakhic rulings (Jewish law) on Isaiah 42:9: and classical halakhic sources.