11 Samuel said, "What have you done?" Saul said, "Because I saw that the people were scattered from me, and that you didn't come within the days appointed, and that the Philistines assembled themselves together at Michmash;
*Minor differences ignored. Grouped by changes, with first version listed as example.
Saul had come from Michmash to Gilgal, expecting to gather the force of the whole nation around him. Instead of that, the people fled, leaving him in the exposed plain with only 600 men 1-Samuel 13:15. The Philistines occupied Michmash, and might at any moment pour down the valley upon Gilgal. Saul's situation was obviously one of extreme peril. A few hours' delay might prove fatal to him and his little army. Hence, he "forced" himself, etc.
And Saul said - Here he offers three excuses for his conduct:
1. The people were fast leaving his standard.
2. Samuel did not come at the time, למועד lemoed; at the very commencement of the time he did not come, but within that time he did come.
3. The Philistines were coming fast upon him.
Saul should have waited out the time; and at all events he should not have gone contrary to the counsel of the Lord.
And Samuel said, What hast thou done? And Saul said, Because I saw that the people were (h) scattered from me, and [that] thou camest not within the days appointed, and [that] the Philistines gathered themselves together at Michmash;
(h) Though these causes seem sufficient in man's judgment: yet because they had not the word of God, they turned to his destruction.
And Samuel said, what hast thou done? This question he put to bring him to a confession of what he had done, otherwise he guessed at it by his countenance; or rather, by the prophetic spirit he was endowed with, he knew it certainly that he had offered the sacrifices without waiting for him:
and Saul said because I saw the people were scattered from me; they were deserting, and he feared, if he stayed any longer, they would all leave him; this was one reason of doing what he did:
and that thou camest not within the days appointed; seven days were appointed, and because the seventh day was come, though it was not gone, he concluded Samuel would not come at all; and that was another reason why he did what he did; and by this would have laid the blame on Samuel, as if he did not keep his time; whereas it was Saul's impatience that hurried him to this action:
and that the Philistines gathered themselves together to Michmash; where his station before was, and from thence he might quickly expect them at Gilgal; and this was another reason why he hastened the sacrifice.
Camest not - That is, when the seventh day was come, and a good part of it past, whence I concluded thou wouldst not come that day.
*More commentary available at chapter level.