عَنْ زِيَادِ بْنِ جُبَيْرٍ، قَالَ: سَأَلَ رَجُلٌ ابْنَ عُمَرَ وَهُوَ يَمْشِي بِمِنًى، فَقَالَ: نَذَرْتُ أَنْ أَصُومَ كُلَّ يَوْمِ ثَلَاثَاءَ أَوْ أَرْبَعَاءَ، فَوَافَقَتْ هَذَا الْيَوْمَ، يَوْمَ النَّحْرِ، فَمَا تَرَى؟ قَالَ: أَمَرَ اللَّهُ تَعَالَى بِوَفَاءِ النَّذْرِ، وَنَهَى رَسُولُ اللَّهِ أَوْ قَالَ: نُهِينَا أَنْ نَصُومَ يَوْمَ النَّحْرِ، قَالَ: فَظَنَّ الرَّجُلُ أَنَّهُ لَمْ يَسْمَعْ فَقَالَ: إِنِّي نَذَرْتُ أَنْ أَصُومَ كُلَّ يَوْمِ ثَلَاثَاءَ أَوْ أَرْبَعَاءَ، فَوَافَقَتْ هَذَا الْيَوْمَ، يَوْمَ النَّحْرِ، فَقَالَ: أَمَرَ اللَّهُ بِوَفَاءِ النَّذْرِ وَنَهَانَا رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ أَوْ قَالَ: نُهِينَا أَنْ نَصُومَ يَوْمَ النَّحْرِ، قَالَ: فَمَا زَادَهُ عَلَى ذَلِكَ حَتَّى أَسْنَدَ فِي الْجَبَلِ
Ziyad bin Jubair says that Sayyiduna Abdullah bin Umar (may Allah be pleased with him) was walking in Mina when a man asked him a question, saying: I have made a vow to fast every Tuesday or Wednesday, but now this day is coming on the day of Eid al-Adha. What is your opinion about this? He (may Allah be pleased with him) said: Allah Almighty has commanded the fulfillment of vows, but the Messenger of Allah (peace and blessings be upon him) has forbidden us from fasting on the day of Eid al-Adha. The man thought that perhaps he had not heard his question, so he repeated: I have made a vow to fast every Tuesday or Wednesday, but this time this day is coming on the day of Eid al-Adha. Sayyiduna Abdullah bin Umar (may Allah be pleased with him) said: Allah Almighty has commanded the fulfillment of vows, and the Messenger of Allah (peace and blessings be upon him) has forbidden us from fasting on the day of Eid al-Adha. He did not say anything more than this until he climbed the mountain.