A man came to Messenger of Allah 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." (Using translation from Bukhārī 2785)
جَاءَ رَجُلٌ إِلَى النَّبِيِّ ﷺ فَقَالَ يَا رَسُولَ اللهِ عَلِّمْنِي عَمَلًا يَعْدِلُ الْجِهَادَ قَالَ لَا أَجِدُهُ ثُمَّ قَالَ فَقَالَ هَلْ تَسْتَطِيعُ إِذَا خَرَجَ الْمُجَاهِدُ أَنْ تَدْخُلَ الْمَسْجِدَ فَتَقُومَ وَلَا تَفْتُرَ وَتَصُومَ وَلَا تُفْطِرَ؟ قَالَ لَا أَسْتَطِيعُ ذَلِكَ قَالَ أَبُو هُرَيْرَةَ إِنَّ فَرَسَ الْمُجَاهِدِينَ يَسْتَنُّ فِي طُولِهِ فَيُكْتَبُ لَهُ حَسَنَاتٍ لَفْظُ حَدِيثِ جَعْفَرٍ