Jihad (Kitab Al-Jihad)
Dawud :: Book 14 : Hadith 2482
Narrated Thabit ibn Qays:
A woman called Umm Khallad came to the Prophet (peace_be_upon_him) while she was veiled. She was searching for her son who had been killed (in the battle) Some of the Companions of the Prophet (peace_be_upon_him) said to her: You have come here asking for your son while veiling your face? She said: If I am afflicted with the loss of my son, I shall not suffer the loss of my modesty. The Apostle of Allah (peace_be_upon_him) said: You will get the reward of two martyrs for your son. She asked: Why is that so, Apostle of Allah? He replied: Because the people of the Book have killed him.