וַתִּרְא֗וּ כִּֽי־נָחָ֞שׁ מֶ֣לֶךְ בְּנֵֽי־עַמּוֹן֮ בָּ֣א עֲלֵיכֶם֒ וַתֹּ֣אמְרוּ לִ֔י לֹ֕א כִּי־מֶ֖לֶךְ יִמְלֹ֣ךְ עָלֵ֑ינוּ וַיהוָ֥ה אֱלֹהֵיכֶ֖ם מַלְכְּכֶֽם׃
And when ye saw that Nahash the king of the children of Ammon came against you, ye said unto me: Nay, but a king shall reign over us; when the LORD your God was your king.
Read halakhic rulings (Jewish law) on I Samuel 12:12 from the Mishneh Torah and classical halakhic sources, free online.