Three days and three nights - Indicating that at least so long a time had elapsed since the sack of Ziklag.
Related Commentaries of 1 Samuel 30:12
1 Samuel 30:12
12 And they gave him a piece of a cake of figs, and two clusters of raisins: and when he had eaten, his spirit came again to him: for he had eaten no bread, nor drunk any water, three days and three nights.