Jihad in Hadith

The Hadiths are narrations originating from the words and deeds of the Islamic prophet Muhammad. Hadith are regarded by the traditional schools of jurisprudence as important tools for understanding the Qur'an and in matters of jurisprudence. Jihad is an Islamic term which is a religious duty of Muslims. As in other matters of Islam, there are many Hadith explaining the concept of Jihad. Of the 199 references to jihad in perhaps the most standard collection of hadith—Bukhari—all assume that jihad means warfare.

Sahih al-Bukhari
Sahih al-Bukhari is one of the six canonical Hadith collections of Sunni Islam. Sunni Muslims regard it as being the most authentic of the six, and is considered to be the most authentic book after Qur-an. Sahih al-Bukhari contains a chapter "Fighting for the Cause of Allah (Jihad)".