[ALLAH’S Quran – 4:136] “O you who have attained to faith! Hold fast unto your belief in God and His Apostle, and in the divine writ which He has bestowed from on high upon His Apostle, step by step, as well as in the revelation which He sent down afore time: for he who denies God, and His angels, and His revelations, and His apostles, and the Last Day, has indeed gone far astray.”

The Prophet (peace be upon him) has said:
[Bukhari, Book #2, Hadith #35] “Narrated Abu Huraira: The Prophet said, “The person who participates in ALLAH’s cause and nothing compels him to do so except belief in ALLAH and His Apostles, will be recompensed by ALLAH either with a reward, or booty (if he survives) or will be admitted to Paradise (if he is killed in the battle as a martyr). Had I not found it difficult for my followers, then I would not remain behind any sariya going for Jihad and I would have loved to be martyred in ALLAH’s cause and then made alive, and then martyred and then made alive, and then again martyred in His cause.”