Volume 8, Book 78, Number 619:
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.”