Hadith - Do not ask for leadership

In the Name of Allah, the Most Gracious, the Most Merciful. 

Abu Sa'id 'Abdu'r-Rahman ibn Samura said, "The Messenger of Allah, may Allah bless him and grant him peace, said to me, 'O 'Abdu'r-Rahman ibn Samura. Do not ask for leadership. If you are given it without asking for it, you will be helped in it. If you are given it through asking for it, it will be up to you. If you make a vow and then see something other than it which is better than it, then do that which is better and expiate your oath.'" [Agreed upon]

Abu Dharr said, "I said, 'Messenger of Allah, why do you not appoint me?' He clapped me on the shoulder with his hand and then said, 'Abu Dharr, you are weak. It is a trust, and on the Day of Rising it will be disgrace and regret except for the man who takes it as it should be taken and fulfils what is demanded of him in respect of it.'" [Muslim]

Abu Hurayra reported that the Messenger of Allah, may Allah bless him and grant him peace, said, "You will covet leadership, but it will be a source of regret on the Day of Rising." [al-Bukhari]

Riyad as-Salihin (The Meadows of the Righteous) of Imam Mohieddine Annawawi 631-676. Chapter 81"On the prohibition against seeking authority and the option of not accepting it if it is not specific to him or if he is not required", Hadiths No 674, 676 and 677.