Sahih Muslim Book: 28, Hadith: 4370

حَدَّثَنَا شَيْبَانُ بْنُ فَرُّوخَ، حَدَّثَنَا جَرِيرُ بْنُ حَازِمٍ، حَدَّثَنَا الْحَسَنُ، حَدَّثَنَا عَبْدُ الرَّحْمَنِ، بْنُ سَمُرَةَ قَالَ قَالَ لِي رَسُولُ اللَّهِ صلى الله عليه وسلم ‏ “‏ يَا عَبْدَ الرَّحْمَنِ بْنَ سَمُرَةَ لاَ تَسْأَلِ الإِمَارَةَ فَإِنَّكَ إِنْ أُعْطِيتَهَا عَنْ مَسْأَلَةٍ وُكِلْتَ إِلَيْهَا وَإِنْ أُعْطِيتَهَا عَنْ غَيْرِ مَسْأَلَةٍ أُعِنْتَ عَلَيْهَا وَإِذَا حَلَفْتَ عَلَى يَمِينٍ فَرَأَيْتَ غَيْرَهَا خَيْرًا مِنْهَا فَكَفِّرْ عَنْ يَمِينِكَ وَائْتِ الَّذِي هُوَ خَيْرٌ ‏”‏ ‏.‏ Abd al-Rahman b. Samura reported that Allah’s Messenger (may peace be upon him) said to me:Abd al-Rahman b. Samura, don’t ask for authority for if it is granted to you for asking for it, you would be commissioned for it (without having the support of Allah), but if you are granted it without your asking for it. You would be helped (by Allah) in it. And when you take an oath and find something else better than that, expiate for (breaking) your oath, and do that which is better. This hadit