Fighting for the Cause of Allah (Jihaad)

Volume 4, Book 52, Number 41:
Narrated Abdullah bin Masud:
I asked Allah's Apostle, "O Allah's Apostle! What is the best deed?" He replied, "To offer the prayers at their early stated fixed times." I asked, "What is next in goodness?" He replied, "To be good and dutiful to your parents." I further asked, what is next in goodness?" He replied, "To participate in Jihad in Allah's Cause." I did not ask Allah's Apostle anymore and if I had asked him more, he would have told me more.
Volume 4, Book 52, Number 42:
Narrated Ibn 'Abbas:
Allah's Apostle said, "There is no Hijra (i.e. migration) (from Mecca to Medina) after the Conquest (of Mecca), but Jihad and good intention remain; and if you are called (by the Muslim ruler) for fighting, go forth immediately.
Volume 4, Book 52, Number 43:
Narrated 'Aisha:
(That she said), "O Allah's Apostle! We consider Jihad as the best deed. Should we not fight in Allah's Cause?" He said, "The best Jihad (for women) is Hajj-Mabrur (i.e. Hajj which is done according to the Prophet's tradition and is accepted by Allah)."
Volume 4, Book 52, Number 44:
Narrated Abu Huraira:
A man came to Allah's Apostle and said, "Instruct me as to such a deed as equals Jihad (in reward)." He replied, "I do not find such a deed." Then he added, "Can you, while the Muslim fighter is in the battle-field, enter your mosque to perform prayers without cease and fast and never break your fast?" The man said, "But who can do that?" Abu- Huraira added, "The Mujahid (i.e. Muslim fighter) is rewarded even for the footsteps of his horse while it wanders bout (for grazing) tied in a long rope."
Volume 4, Book 52, Number 45:
Narrated Abu Said Al-Khudri:
Somebody asked, "O Allah's Apostle! Who is the best among the people?" Allah's Apostle replied "A believer who strives his utmost in Allah's Cause with his life and property." They asked, "Who is next?" He replied, "A believer who stays in one of the mountain paths worshipping Allah and leaving the people secure from his mischief."
Volume 4, Book 52, Number 46:
Narrated Abu Huraira:
I heard Allah's Apostle saying, "The example of a Mujahid in Allah's Cause-- and Allah knows better who really strives in His Cause----is like a person who fasts and prays continuously. Allah guarantees that He will admit the Mujahid in His Cause into Paradise if he is killed, otherwise He will return him to his home safely with rewards and war booty."
Volume 4, Book 52, Number 47:
Narrated Anas bin Malik:
Allah's Apostle used to visit Um Haran bint Milhan, who would offer him reals. Um-Haram was the wife of Ubada bin As-Samit. Allah's Apostle, once visited her and she provided him with food and started looking for lice in his head. Then Allah's Apostle slept, and afterwards woke up smiling. Um Haran asked, "What causes you to smile, O Allah's Apostle?" He said. "Some of my followers who (in a dream) were presented before me as fighters in Allah's Cause (on board a ship) amidst this sea cause me to smile; they were as kings on the thrones (or like kings on the thrones)." (Ishaq, a sub-narrator is not sure as to which expression the Prophet used.) Um-Haram said, "O Allah's Apostle! Invoke Allah that he makes me one of them. Allah's Apostle invoked Allah for her and slept again and woke up smiling. Once again Um Haram asked, "What makes you smile, O Allah's Apostle?" He replied, "Some of my followers were presented to me as fighters in Allah's Cause," repeating the same dream. Um-Haram said, "O Allah's Apostle! Invoke Allah that He makes me one of them." He said, "You are amongst the first ones." It happened that she sailed on the sea during the Caliphate of Mu'awlya bin Abi Sufyan, and after she disembarked, she fell down from her riding animal and died.
Volume 4, Book 52, Number 48:
Narrated Abu Huraira:
The Prophet said, "Whoever believes in Allah and His Apostle, offer prayer perfectly and fasts the month of Ramadan, will rightfully be granted Paradise by Allah, no matter whether he fights in Allah's Cause or remains in the land where he is born." The people said, "O Allah's Apostle ! Shall we acquaint the people with the is good news?" He said, "Paradise has one-hundred grades which Allah has reserved for the Mujahidin who fight in His Cause, and the distance between each of two grades is like the distance between the Heaven and the Earth. So, when you ask Allah (for something), ask for Al-firdaus which is the best and highest part of Paradise." (i.e. The sub-narrator added, "I think the Prophet also said, 'Above it (i.e. Al-Firdaus) is the Throne of Beneficent (i.e. Allah), and from it originate the rivers of Paradise.")