Battle of Ehzaab

Abu Sufyan had succeeded in forming a military alliance composed of the Jews and various tribes of the Arabs. The news of this great army was brought to the Holy Prophet (peace be upon him). He called a meeting of His Companions. On the suggestion of Hazrat Salman Farsi, a trench of a depth of five cubits and width of more than ten cubits was dug, all around. The ten thousand strong army of Quresh tried to cross it for 25 days but in-vain. At last, the army began to defect and Abu Sufyan was forced to lead it back to Makkah in utter depression.