He said, "What is the thing that [Yahweh] has spoken to you? Please don't hide it from me. God do so to you, and more also, if you hide anything from me of all the things that he spoke to you."
God do so to thee, and more also, if thou hide anything from me of all the things that said unto thee; it is the form of an oath or curse, wishing that God would do some great evil to him, and more than he chose to express, if he concealed anything from him that had been told him. So Kimchi and Abarbinel take it to be an oath; and Josephus, u and Procopius Gazaeus on the place say, that Eli obliged Samuel by oaths and curses to declare what had been said to him.