WEB
Then Saul fell immediately his full length on the earth, and was terrified, because of the words of Samuel. There was no strength in him; for he had eaten no bread all the day, nor all the night.
YLT
And Saul hasteth and falleth—the fulness of his stature—to the earth, and feareth greatly because of the words of Samuel; also power was not in him, for he had not eaten bread all the day, and all the night.