וַיֹּ֣אמֶר אֲלֵהֶ֔ם כָּזֹ֣ה וְכָזֶ֔ה עָ֥שָׂה לִ֖י מִיכָ֑ה וַיִּשְׂכְּרֵ֕נִי וָאֱהִי־ל֖וֹ לְכֹהֵֽן׃
And he said unto them: ‘Thus and thus hath Micah dealt with me, and he hath hired me, and I am become his priest.’
Read midrashic interpretation of Judges 18:4: and classical rabbinic exegesis.