Girded with a linen ephod - This was the usual dress of the priests. It does not appear whether Levites wore an ephod properly. Possibly it was a mark of Samuel’s special dedication to the Lord’s service that he wore one. (See the marginal reference). The ephod was sometimes used as an idolatrous implement Judges 8:27.
Related Commentaries of 1 Samuel 2:18
1 Samuel 2:18
18 But Samuel ministered before the LORD, being a child, girded with a linen ephod.