5 Just then Saul was returning from the fields, behind his oxen, and he asked, "What is wrong with everyone? Why are they weeping?" Then they repeated to him what the men of Jabesh had said. 6 When Saul heard their words, the Spirit of God came powerfully upon him, and he burned with anger. 7 He took a pair of oxen, cut them into pieces, and sent the pieces by messengers throughout Israel, proclaiming, "This is what will be done to the oxen of anyone who does not follow Saul and Samuel." Then the terror of the Lord fell on the people, and they came out together as one. 8 When Saul mustered them at Bezek, the men of Israel numbered three hundred thousand and those of Judah thirty thousand. 9 They told the messengers who had come, "Say to the men of Jabesh Gilead, 'By the time the sun is hot tomorrow, you will be rescued.' " When the messengers went and reported this to the men of Jabesh, they were elated. 10 They said to the Ammonites, "Tomorrow we will surrender to you, and you can do to us whatever you like." 11 The next day Saul separated his men into three divisions; during the last watch of the night they broke into the camp of the Ammonites and slaughtered them until the heat of the day. Those who survived were scattered, so that no two of them were left together.

Matthew Henry's Commentary on 1 Samuel 11:5-11

Commentary on 1 Samuel 11:1-11

(Read 1 Samuel 11:1-11)

The first fruit of Saul's government was the rescue of Jabesh-gilead from the Ammonites. To save their lives, men will part with liberty, and even consent to have their eyes put out; is it then no wisdom to part with that sin which is as dear to us as our right eye, rather than to be cast into hell-fire? See the faith and confidence of Saul, and, grounded thereon, his courage and resolution. See also his activity in this business. When the Spirit of the Lord comes upon men, it will make them expert, even without experience. When zeal for the glory of God, and love for the brethren, urge men to earnest efforts, and when God is pleased to help, great effects may speedily be produced.