Sahih Muslim Book - 1, Hadith - 366

و حَدَّثَنَا أَبُو غَسَّانَ الْمِسْمَعِيُّ وَمُحَمَّدُ بْنُ الْمُثَنَّى وَإِسْحَاقُ بْنُ إِبْرَاهِيمَ قَالَ إِسْحَاقُ أَخْبَرَنَا وَقَالَ الْآخَرَانِ حَدَّثَنَا مُعَاذُ بْنُ هِشَامٍ قَالَ حَدَّثَنِي أَبِي عَنْ قَتَادَةَ عَنْ أَبِي الْمَلِيحِ أَنَّ عُبَيْدَ اللَّهِ بْنَ زِيَادٍ عَادَ مَعْقِلَ بْنَ يَسَارٍ فِي مَرَضِهِ فَقَالَ لَهُ مَعْقِلٌ إِنِّي مُحَدِّثُكَ بِحَدِيثٍ لَوْلَا أَنِّي فِي الْمَوْتِ لَمْ أُحَدِّثْكَ بِهِ سَمِعْتُ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَقُولُ مَا مِنْ أَمِيرٍ يَلِي أَمْرَ الْمُسْلِمِينَ ثُمَّ لَا يَجْهَدُ لَهُمْ وَيَنْصَحُ إِلَّا لَمْ يَدْخُلْ مَعَهُمْ الْجَنَّةَ.

It was narrated from Abu Al-Malih that 'Ubaidullah bin Ziyad visited Ma'qil bin Yasar when he was sick, and Ma'qil said to him: "I am going to tell you about a Hadith which, if I were not dying, I would not tell you. I heard the Messenger of Allah (s.a.w) say: 'There is no commander who becomes in charge of the Muslims, then does not strive sincerely for them, but he will not enter Paradise with them.'"