הֲל֤וֹא תֵֽדְעוּ֙ הֲל֣וֹא תִשְׁמָ֔עוּ הֲל֛וֹא הֻגַּ֥ד מֵרֹ֖אשׁ לָכֶ֑ם הֲלוֹא֙ הֲבִ֣ינֹתֶ֔ם מוֹסְד֖וֹת הָאָֽרֶץ׃
너희가 알지 못하였느냐 너희가 듣지 못하였느냐 태초부터 너희에게 전하지 아니하였느냐 땅의 기초가 창조될 때부터 너희가 깨닫지 못하였느냐
Rashi on Isaiah
Do you not know...the foundations of the earth Who founded it, and you should have worshipped Him.
Ibn Ezra on Isaiah
הלא תדעו Have ye not known by your own common sense, which is the most important source of knowledge ;
Ibn Ezra on Isaiah
הלא תשמעו have you not heard; have you not been informed by others;