Whoever feels fear in himself should not go to war.
رسولُ اللَّهِ صلى اللَّه عليه وآله : مَن أحَسَّ مِن نَفسِهِ جُبناً فَلا يَغزُ . دعائم الإسلام : 1 / 342 .
The Prophet (SAWA) said, 'Whoever feels fear in himself should not go to war.' Daaim al-Islam, v. 1, p. 342