Saul's men sighted the enemy on the other side of the river. Their opponents appeared physically strong and were armed with better weapons. They were led by the mighty warrior Goliath (Galut), known for his huge build and brute strength. A great number of Saul's men ran away on seeing this strong force. The small band that remained was willing to fight, whatever the outcome, for they had heard that there had been many incidents in the past in which Allah had caused a small force to defeat a larger one.
Related Quran Ayaaths of this Hadith.
"When a person dies, his works end, except for three: ongoing charity, knowledge that is benefited from, and a righteous child who prays for him."
Prophet Mohammed (PBUH)
"The best of what a man leaves behind are three: a righteous child who supplicates for him, ongoing charity the reward of which reaches him, and knowledge that is acted upon after him."
Sunan Ibn Mājah
"Every day two angels come down from Heaven and one of them says, 'O Allah! Compensate every person who spends in Your Cause,' and the other (angel) says, 'O Allah! Destroy every miser.'"
Sahih Bukhari