1 Samuel 28:17 - Matthew Poole's English Annotations on the Holy Bible

The Lord hath done to him, i.e. to David, as it is explained in the following words; the pronoun relative put before the noun to which it belongs, as is usual in the Hebrew text, as Psalms 87:105:19 Proverbs 7:7,8 Jer 40:5. Otherwise, to him is put for to thee; such changes of persons being frequent among the Hebrews. Otherwise, for himself, i. e. for the accomplishment of his counsel, and prediction, and oath, and for the glory of his justice and holiness. As he spake by me: still he nourisheth this persuasion in Saul, that it was the true Samuel that spake to him.