David and his men rode back into the city in which their families had been staying. What they found was ruins. It had been burnt to the ground and their wives and children had been taken captive. 

Immediately David asked the Lord “should I go after them?”

Impressive. David had enough self-control to consult the Lord. He didn’t just take off on his own in a knee-jerk reaction but he sought out the Lord’s direction.
Let us learn from David. No matter how dire the situation may be there is always time to consult the Lord.