Abu Hurairah reported the Prophet ﷺ as saying “He who dies without having fought or having felt fighting (against the infidels) to be his duty will die guilty of a kind of hypocrisy.” (Using translation from Abū Dāʾūd 2502)  

عَنِ النَّبِيِّ ﷺ قَالَ «مَنْ مَاتَ وَلَمْ يَغْزُ وَلَمْ يُحَدِّثْ نَفْسَهُ بِغَزْوٍ مَاتَ عَلَى شُعْبَةِ نِفَاقٍ»