Narrated 'Abdur-Rahman bin Samura:
The Prophet said, "O 'Abdur-Rahman bin Samura! Do not seek to be a ruler, because if you are given authority for it, then you will be held responsible for it, but if you are given it without asking for it, then you will be helped in it (by Allah): and whenever you take an oath to do something and later you find that something else is better than the first, then do the better one and make expiation for your oath."

Narrated Abu Huraira:
Abu-l-Qasim (the Prophet) said, "By Him in Whose Hand Muhammad's soul is, if you know that which I know, you would weep much and laugh little."

Narrated Haritha bin Wahb:
I heard the Prophet saying, "Shall I tell you of the people of Paradise? They comprise every poor humble person, and if he swears by Allah to do something, Allah will fulfill it; while the people of the fire comprise every violent, cruel arrogant person."