It was narrated that Abu Hurairah said: "I heard the Messenger of Allah (ﷺ) say: 'By the One in Whose hand is my soul, were it not that some men among the believers would not like to stay behind when I went out (to fight), and I could not find any mounts for them, I would not have stayed behind from any campaign that fought in the cause of Allah. By the One in Whose hand is my soul, I wish that I could be killed in the cause of Allah, then brought back to life, then killed, then be brought back to life, then killed.'"
Source: sunnah.com
Other translations
Arabic
أَخْبَرَنَا عَمْرُو بْنُ عُثْمَانَ بْنِ سَعِيدٍ، قَالَ حَدَّثَنَا أَبِي، عَنْ شُعَيْبٍ، عَنِ الزُّهْرِيِّ، قَالَ حَدَّثَنِي سَعِيدُ بْنُ الْمُسَيَّبِ، عَنْ أَبِي هُرَيْرَةَ، قَالَ سَمِعْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم يَقُولُ " وَالَّذِي نَفْسِي بِيَدِهِ لَوْلاَ أَنَّ رِجَالاً مِنَ الْمُؤْمِنِينَ لاَ تَطِيبُ أَنْفُسُهُمْ بِأَنْ يَتَخَلَّفُوا عَنِّي وَلاَ أَجِدُ مَا أَحْمِلُهُمْ عَلَيْهِ مَا تَخَلَّفْتُ عَنْ سَرِيَّةٍ تَغْزُو فِي سَبِيلِ اللَّهِ وَالَّذِي نَفْسِي بِيَدِهِ لَوَدِدْتُ أَنِّي أُقْتَلُ فِي سَبِيلِ اللَّهِ ثُمَّ أُحْيَا ثُمَّ أُقْتَلُ ثُمَّ أُحْيَا ثُمَّ أُقْتَلُ " .
sunnah.com