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)".
According to a Hadith in Sahih Bukhari, participating in Jihad is the third best deed for man, after offering prayers at their stated times and being dutiful to one's parents whereas another Hadith in the same collection has Jihad as the second best deed, after belief in Allah and Muhammad. In another Hadith in Bukhari, it is said that there is no migration after the Conquest of Mecca, but Jihad and good intention remain; and if one is called by the Muslim ruler for fighting, one should go forth immediately. Jihad for women is different from that of men. In 4:42:42, Muhammad is reported to have said that the best Jihad for women is Hajj. Another Hadith (4:52:44) says that no deed equals Jihad in reward, and that the Mujahid is rewarded even for the footsteps of his horse while it wanders about.
Read more about this topic: Jihad In Hadith