As Samuel was offering up the burnt offering, the Philistines drew near to battle against Israel; but Yahweh thundered with a great thunder on that day on the Philistines, and confused them; and they were struck down before Israel.
The memorial stone bore witness to the effectiveness of trusting the Lord and His designated judge. If the Lord had helped the people thus far, what need was there for a king? This incident shows that the people should have continued following the leadership of the judges that God had been raising up for them. This was not the right time for a king.