Praise be to the Lord, the God of Israel, who has sent you today to meet me

1 Samuel 25:1-35
His name was Nabal and his wife’s name was Abigail. She was an intelligent and beautiful woman, but her husband was surly and mean in his dealings—he was a Calebite.
He is such a wicked man that no one can talk to him.
It’s been useless—all my watching over this fellow’s property in the wilderness so that nothing of his was missing. He has paid me back evil for good.
David said to Abigail, “Praise be to the Lord, the God of Israel, who has sent you today to meet me. May you be blessed for your good judgment and for keeping me from bloodshed this day and from avenging myself with my own hands.
The chapter opens with the death of Samuel. Not until Elijah will there be another religious leader to equal him. The old prophet had anointed Israel's greatest king but did not live to see him reign. It is the end of an era.
David's request to Nabal is not unreasonable. He is not demanding protection money but asking for some return on past services. After all, the man was rich and it was sheepshearing, a feast time.
Abigail is as clever as she is beautiful. Her quick action saves the lives of her husband and household. 
Why?
Abigail keep David from bloodshed and from avenging himself with his own hands. For a humble man can listen to Abigail's suggestion.
Facing to Saul is difficulty so we will pray to the Lord. But to a easy enemy we will try to use our own way to make it
 If David attack Nabal, it is fight for his own prophet, this is man's weakness.
How?
Do not fall into motion and make wrong decision, keep silent calm down our motion.