Sahih al-Bukhari 6415
Narrated Sahl:
I heard the Prophet (ﷺ) saying, "A (small) place equal to an area occupied by a whip in Paradise is better 
than the (whole) world and whatever is in it; and an undertaking (journey) in the forenoon or in the 
afternoon for Allah's Cause, is better than the whole world and whatever is in it."
حَدَّثَنَا عَبْدُ اللَّهِ بْنُ مَسْلَمَةَ، حَدَّثَنَا عَبْدُ الْعَزِيزِ بْنُ أَبِي حَازِمٍ، عَنْ أَبِيهِ، عَنْ سَهْلٍ، قَالَ سَمِعْتُ النَّبِيَّ صلى الله عليه وسلم يَقُولُ ‏
"‏ مَوْضِعُ سَوْطٍ فِي الْجَنَّةِ خَيْرٌ مِنَ الدُّنْيَا وَمَا فِيهَا، وَلَغَدْوَةٌ فِي سَبِيلِ اللَّهِ أَوْ رَوْحَةٌ خَيْرٌ مِنَ الدُّنْيَا وَمَا فِيهَا ‏"‏‏.‏