A man came to Allah's Messenger (ﷺ) 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."

Somebody asked, "O Allah's Messenger (ﷺ)! Who is the best among the people?" Allah's Messenger (ﷺ) 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."

I heard Allah's Messenger (ﷺ) 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."