I went to Messenger of Allah ﷺ along with a group of people from (the tribe of) Al-Ashʿari, asking for mounts. The Prophet ﷺ said, "By Allah, I will not give you anything to ride, and I have nothing to mount you on." We stayed there as long as Allah wished, and after that, some camels were brought to the Prophet and he ordered that we be given three camels. When we set out, some of us said to others, "Allah will not bless us, as we all went to Messenger of Allah ﷺ asking him for mounts, and although he had sworn that he would not give us mounts, he did give us." So we returned to the Prophet; and mentioned that to him. He said, "I have not provided you with mounts, but Allah has. By Allah, Allah willing, if I ever take an oath, and then see that another is better than the first, I make expiration for my (dissolved) oath, and do what is better and make expiration." (Using translation from Bukhārī 6718)  

أَتَيْتُ رَسُولَ اللهِ ﷺ فِي يَعْنِي رَهْطٍ مِنَ الْأَشْعَرِيِّينَ نَسْتَحْمِلُهُ فَقَالَ «وَاللهِ لَا أَحْمِلُكُمْ وَمَا عِنْدِي مَا أَحْمِلُكُمْ» ثُمَّ لَبِثْنَا مَا شَاءَ اللهُ فَأُتِيَ بِإِبِلٍ فَأَمَرَ لَنَا بِثَلَاثَةِ ذَوْدٍ فَلَمَّا انْطَلَقْنَا قَالَ بَعْضُنَا لِبَعْضٍ لَا يُبَارِكُ اللهُ لَنَا أَتَيْنَا رَسُولَ اللهِ ﷺ نَسْتَحْمِلُهُ فَحَلَفَ لَا يَحْمِلُنَا فَحَمَلْنَا قَالَ أَبُو مُوسَى فَأَتَيْنَا النَّبِيَّ ﷺ فَذَكَرْنَا ذَلِكَ لَهُ فَقَالَ «مَا أَنَا حَمَلْتُكُمْ بَلِ اللهُ حَمَلَكُمْ إِنِّي وَاللهِ إِنْ شَاءَ اللهُ لَا أَحْلِفُ عَلَى يَمِينٍ فَأَرَى غَيْرَهَا خَيْرًا مِنْهَا إِلَّا كَفَّرْتُ عَنْ يَمِينِي وَأَتَيْتُ الَّذِي هُوَ خَيْرٌ»  

He who took an oath and then found another thing better than (this) should expiate for the oath (broken) by him and do (the better thing). (Using translation from Muslim 1650b)   

أَنَّ رَسُولَ اللهِ ﷺ قَالَ «مَنْ حَلَفَ عَلَى يَمِينٍ فَرَأَى الَّذِي هُوَ خَيْرٌ فَلْيُكَفِّرْ عَنْ يَمِينِهِ وَلْيَفْعَلْ»  

the Messenger of Allah ﷺ, said: "Whoever swears an oath then sees that something else is better than it, let him do that which is better and offer expiation for what he swore about. " (Using translation from Ibn Mājah 2108)  

أَنَّ رَسُولَ اللهِ ﷺ قَالَ «مَنْ حَلَفَ عَلَى يَمِينٍ فَرَأَى غَيْرَهَا خَيْرًا مِنْهَا فَلْيُكَفِّرْ عَنْ يَمِينِهِ وَلْيَأْتِ الَّذِي هُوَ خَيْرٌ»  

"If any one of you swears an oath, then he sees something better than it, let him offer expiation for his oath, and look at what is better and do it." (Using translation from Nasāʾī 3782)  

عَنْ رَسُولِ اللهِ ﷺ قَالَ «إِذَا حَلَفَ أَحَدُكُمْ عَلَى يَمِينٍ فَرَأَى غَيْرَهَا خَيْرًا مِنْهَا فَلْيُكَفِّرْ عَنْ يَمِينِهِ وَلْيَنْظُرْ إِلَى الَّذِي هُوَ خَيْرٌ فَلْيَأْتِهِ»  

"The Messenger of Allah said: 'If you swear an oath, offer expiation for your oath, then do that which is better.'" (Using translation from Nasāʾī 3783)  

قَالَ لِي رَسُولُ اللهِ ﷺ «إِذَا حَلَفْتَ عَلَى يَمِينٍ فَكَفِّرْ عَنْ يَمِينِكَ ثُمَّ ائْتِ الَّذِي هُوَ خَيْرٌ»  

"If you swear an oath, then you see something better than it, then offer expiation for your oath, and do that which is better." (Using translation from Nasāʾī 3784)  

أَنَّ النَّبِيَّ ﷺ قَالَ «إِذَا حَلَفْتَ عَلَى يَمِينٍ فَرَأَيْتَ غَيْرَهَا خَيْرًا مِنْهَا فَكَفِّرْ عَنْ يَمِينِكَ وَائْتِ الَّذِي هُوَ خَيْرٌ»