Sahih Muslim
The Book of Faith (Kitab Al-Iman)
Book Number: 001 / Hadith Number: 264
It is narrated on the authority of Abu Malih that Ubaidullah b. Ziyad visited Ma'qil b. Yasar in his illness. Ma'qil said to him: I am narrating to you a hadith which I would have never narrated to you had I not been in death-bed. I heard Allah's apostle (may peace be upon him) say: A ruler who has been entrusted with the affairs of the Muslims but he makes no endeavors ( for the material and moral uplift) and does not sincerely mean (their welfare) would not enter Paradise along with them.