עַתָּ֤ה נִבְרְאוּ֙ וְלֹ֣א מֵאָ֔ז וְלִפְנֵי־י֖וֹם וְלֹ֣א שְׁמַעְתָּ֑ם פֶּן־תֹּאמַ֖ר הִנֵּ֥ה יְדַעְתִּֽין׃
They are created now, and not from of old, And before this day thou heardest them not; Lest thou shouldest say: ‘Behold, I knew them.’
Read halakhic rulings (Jewish law) on Isaiah 48:7 from the Mishneh Torah and classical halakhic sources, free online.