1 Samuel 2:17-19

So the sin of the [two] young men [Hophni and Phinehas] was very great before the LORD, for the men treated the offering of the LORD disrespectfully. ORD Now Samuel was ministering before the LORD, as a child dressed in a linen ephod [a sacred item of priestly clothing]. Moreover, his mother would make him a little robe and would bring it up to him each year when she came up with her husband to offer the yearly sacrifice.