That the Messenger of Allah (ﷺ) said: "Going out in the morning in the cause of Allah is better that the world and what is in it. And the place (the size) of a whip in Paradise is better than the world and what is in it." [Abu 'Eisa said:] There are narrations on this topic from Abu Hurairah, Ibn 'Abbas, Abu Ayyub, and Anas. This Hadith is Hasan Sahih.
حَدَّثَنَا قُتَيْبَةُ، حَدَّثَنَا الْعَطَّافُ بْنُ خَالِدٍ الْمَخْزُومِيُّ، عَنْ أَبِي حَازِمٍ، عَنْ سَهْلِ بْنِ سَعْدٍ السَّاعِدِيِّ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم غَدْوَةٌ فِي سَبِيلِ اللَّهِ خَيْرٌ مِنَ الدُّنْيَا وَمَا فِيهَا وَمَوْضِعُ سَوْطٍ فِي الْجَنَّةِ خَيْرٌ مِنَ الدُّنْيَا وَمَا فِيهَا . قَالَ أَبُو عِيسَى وَفِي الْبَابِ عَنْ أَبِي هُرَيْرَةَ وَابْنِ عَبَّاسٍ وَأَبِي أَيُّوبَ وَأَنَسٍ . وَهَذَا حَدِيثٌ حَسَنٌ صَحِيحٌ .
Tirmizi
The Book on Virtues of Jihad • Hadith 1696