God inflict the same evils upon thee, which I suspect he hath pronounced against me, and greater evils too. Or, God do so, i.e. let God deal with thee so severely, as I cannot, or am loth to express. So it is a kind of aposiopesis, usual in oaths and in adjurations. The same phrase is in Ruth 1:17. Thus he adjures him to utter the whole truth, as was usual among the Hebrews, as 1 Kings 22:16 Matthew 26:63.
Related Commentaries of 1 Samuel 3:17
1 Samuel 3:17
17 And he said, What is the thing that the LORD hath said unto thee? I pray thee hide it not from me: God do so to thee, and more also,a if thou hide any thing from me of all the things that he said unto thee.