Then Samuel set out from Gilgal and went up to Gibeah in Benjamin. And Saul numbered the troops who were with him, about six hundred men.
Here, 1. Samuel departs in displeasure. Saul has set up for himself, and now he is left to himself: Samuel gat him from Gilgal (Sa1 13:15), and it does not appear that he either prayed with Saul or directed him. Yet in going up to Gibeah of Benjamin, which was Saul's city, he intimated that he had not quite abandoned him, but waited to do him a kindness another time.
Commenting on 1 Samuel 13:15-23
And Samuel arose,.... Seemingly in wrath and displeasure, not staying to offer up the peace offerings which remained; and though no mention is made of Saul's going with him, yet it seems as if he did, or at least quickly followed him, as appears from the next verse: and got him up from Gilgal unto Gibeah of Benjamin; the native place of Saul, thereby directing...
Samuel . . . gat him . . . unto Gibeah . . . and Saul, and Jonathan his son, and the people that were present with them, abode in Gibeah--Saul removed his camp thither, either in the hope that, it being his native town, he would gain an increase of followers or that he might enjoy the counsels and influence of the prophet.