Jami` at-Tirmidhi, Volume 3, Book 20, Hadith 1650 (DarusSalam) ⓘ

Narrated Abu Hurairah: A man from the Companions of the Prophet passed by ravine containing a small spring of thirst quenching water, so he was amazed by how pleasant it was. So he said: 'I should leave the people and stay in this ravine. But I will not do it until I seek permission from the Messenger of Allah.' So he mentioned that to the Messenger of Allah and he said: 'Do not do so. For indeed one of you standing in the cause of Allah is more virtuous that his Salat in his house for seventy years. Do you not love that Allah forgive your sins and admit you into Paradise ? Then fight in the cause of Allah, for whoever fights in Allah's cause for the time it takes for two milkings of a camel, then Paradise is obligatory for him.'" [Abu 'Eisa said:] This Hadith is Hasan.

حَدَّثَنَا عُبَيْدُ بْنُ أَسْبَاطِ بْنِ مُحَمَّدٍ الْقُرَشِيُّ الْكُوفِيُّ، حَدَّثَنَا أَبِي، عَنْ هِشَامِ بْنِ سَعْدٍ، عَنْ سَعِيدِ بْنِ أَبِي هِلاَلٍ، عَنِ ابْنِ أَبِي ذُبَابٍ، عَنْ أَبِي هُرَيْرَةَ، قَالَ مَرَّ رَجُلٌ مِنْ أَصْحَابِ رَسُولِ اللَّهِ صلى الله عليه وسلم بِشِعْبٍ فِيهِ عُيَيْنَةٌ مِنْ مَاءٍ عَذْبَةٌ فَأَعْجَبَتْهُ لِطِيبِهَا فَقَالَ لَوِ اعْتَزَلْتُ النَّاسَ فَأَقَمْتُ فِي هَذَا الشِّعْبِ وَلَنْ أَفْعَلَ حَتَّى أَسْتَأْذِنَ رَسُولَ اللَّهِ صلى الله عليه وسلم ‏.‏ فَذَكَرَ ذَلِكَ لِرَسُولِ اللَّهِ صلى الله عليه وسلم فَقَالَ ‏ "‏ لاَ تَفْعَلْ فَإِنَّ مَقَامَ أَحَدِكُمْ فِي سَبِيلِ اللَّهِ أَفْضَلُ مِنْ صَلاَتِهِ فِي بَيْتِهِ سَبْعِينَ عَامًا أَلاَ تُحِبُّونَ أَنْ يَغْفِرَ اللَّهُ لَكُمْ وَيُدْخِلَكُمُ الْجَنَّةَ اغْزُوا فِي سَبِيلِ اللَّهِ مَنْ قَاتَلَ فِي سَبِيلِ اللَّهِ فُوَاقَ نَاقَةٍ وَجَبَتْ لَهُ الْجَنَّةُ ‏" ‏ ‏.‏ قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ حَسَنٌ ‏.‏