Reference for I Samuel 2:18

וּשְׁמוּאֵ֕ל מְשָׁרֵ֖ת אֶת־פְּנֵ֣י יְהוָ֑ה נַ֕עַר חָג֖וּר אֵפ֥וֹד בָּֽד׃

But Samuel ministered before the LORD, being a child, girded with a linen ephod.