Saul fell along on the earth, being quite dispirited with these sad and surprising tidings, and so unable to stand.
Related Commentaries of 1 Samuel 28:20
1 Samuel 28:20
20 Then Saul fellc straightway all along on the earth, and was sore afraid, because of the words of Samuel: and there was no strength in him; for he had eaten no bread all the day, nor all the night.