וַיֹּ֤אמֶר יְהוָה֙ אֶל־שְׁמוּאֵ֔ל הִנֵּ֧ה אָנֹכִ֛י עֹשֶׂ֥ה דָבָ֖ר בְּיִשְׂרָאֵ֑ל אֲשֶׁר֙ כָּל־שֹׁ֣מְע֔וֹ תְּצִלֶּ֖ינָה שְׁתֵּ֥י אָזְנָֽיו׃
And the LORD said to Samuel: ‘Behold, I will do a thing in Israel, at which both the ears of every one that heareth it shall tingle.
Read halakhic rulings (Jewish law) on I Samuel 3:11: and classical halakhic sources.