He woke up his ear.
In the question: He brought to his attention relevant information.
("The Lord God has given me the tongue of the learned, that I may know how to speak the word of the wise; morning by morning he awakens my ear to hear like the learned" - Isaiah 54)
Translation
Expression (Hebrew)
הֵעִיר אֶת אָוזְנוֹ
Definition (Hebrew)
בְּהַשְׁאָלָה: הֵבִיא לִידִיעָתוֹ מֵידָע רֵלֵוַונְטִי.
("אֲדֹנָי ה' נָתַן לִי לְשׁוֹן לִמּוּדִים לָדַעַת לָעוּת אֶת יָעֵף דָּבָר יָעִיר בַּבֹּקֶר בַּבֹּקֶר יָעִיר לִי אֹזֶן לִשְׁמֹעַ כַּלִּמּוּדִים"- יְשַׁעְיָהוּ נ ד)