When the Prophet ﷺ came to Medina, he found (the Jews) fasting on the day of 'Ashura' (i.e. 10th of Muharram). They used to say: "This is a great day on which Allah saved Moses and drowned the folk of Pharaoh. Moses observed the fast on this day, as a sign of gratitude to Allah." The Prophet ﷺ said, "I am closer to Moses than they." So, he observed the fast (on that day) and ordered the Muslims to fast on it.  

أَنَّ النَّبِيَّ ﷺ لَمَّا قَدِمَ الْمَدِينَةَ وَجَدَهُمْ يَصُومُونَ يَوْمًا يَعْنِي عَاشُورَاءَ فَقَالُوا هَذَا يَوْمٌ عَظِيمٌ وَهْوَ يَوْمٌ نَجَّى اللَّهُ فِيهِ مُوسَى وَأَغْرَقَ آلَ فِرْعَوْنَ فَصَامَ مُوسَى شُكْرًا لِلَّهِ فَقَالَ أَنَا أَوْلَى بِمُوسَى مِنْهُمْ فَصَامَهُ وَأَمَرَ بِصِيَامِهِ  

What is the (significance) of this day that you observe fast on it? They said: It is the day of great (significance) when Allah delivered Moses and his people, and drowned the Pharaoh and his people, and Moses observed fast out of gratitude and we also observe it. Upon this the Messenger of Allah ﷺ said: We have more right, and we have a closer connection with Moses than you have; so Messenger of Allah ﷺ observed fast (on the day of 'Ashura), and gave orders that it should be observed.  

أَنَّ رَسُولَ اللَّهِ ﷺ قَدِمَ الْمَدِينَةَ فَوَجَدَ الْيَهُودَ صِيَامًا يَوْمَ عَاشُورَاءَ فَقَالَ لَهُمْ رَسُولُ اللَّهِ ﷺ مَا هَذَا الْيَوْمُ الَّذِي تَصُومُونَهُ فَقَالُوا هَذَا يَوْمٌ عَظِيمٌ أَنْجَى اللَّهُ فِيهِ مُوسَى وَقَوْمَهُ وَغَرَّقَ فِرْعَوْنَ وَقَوْمَهُ فَصَامَهُ مُوسَى شُكْرًا فَنَحْنُ نَصُومُهُ فَقَالَ رَسُولُ اللَّهِ ﷺ فَنَحْنُ أَحَقُّ وَأَوْلَى بِمُوسَى مِنْكُمْ فَصَامَهُ رَسُولُ اللَّهِ ﷺ وَأَمَرَ بِصِيَامِهِ  

“The Prophet ﷺ came to Al- Madinah, and he found the Jews observing a fast. He said: ‘What is this?’ They said: ‘This is the day when Allah saved Musa and drowned Pharaoh, so Musa fasted this day in gratitude.’ The Messenger of Allah ﷺ said: ‘We have more right to Musa than you do.’ So he fasted (that day) and enjoined (others) to fast it also.’”  

قَدِمَ النَّبِيُّ ﷺ الْمَدِينَةَ فَوَجَدَ الْيَهُودَ صُيَّامًا فَقَالَ مَا هَذَا؟ قَالُوا هَذَا يَوْمٌ أَنْجَى اللَّهُ فِيهِ مُوسَى وَأَغْرَقَ فِيهِ فِرْعَوْنَ فَصَامَهُ مُوسَى شُكْرًا فَقَالَ رَسُولُ اللَّهِ ﷺ نَحْنُ أَحَقُّ بِمُوسَى مِنْكُمْ فَصَامَهُ وَأَمَرَ بِصِيَامِهِ  

The Prophet ﷺ came to Medina and saw the Jews fasting on the day of Ashura. He asked them about that. They replied, "This is a good day, the day on which Allah rescued Bani Israel from their enemy. So, Moses fasted this day." The Prophet ﷺ said, "We have more claim over Moses than you." So, the Prophet fasted on that day and ordered (the Muslims) to fast (on that day). (Using translation from Bukhārī 2004)  

قَدِمَ رَسُولُ اللهِ ﷺ الْمَدِينَةَ فَرَأَى الْيَهُودَ يَصُومُونَ يَوْمَ عَاشُورَاءَ فَقَالَ مَا هَذَا الْيَوْمُ الَّذِي تَصُومُونَ؟ قَالُوا هَذَا يَوْمٌ صَالِحٌ هَذَا يَوْمٌ نَجَّى اللهُ بَنِي إِسْرَائِيلَ مِنْ عَدُوِّهِمْ قَالَ فَصَامَهُ مُوسَى قَالَ رَسُولُ اللهِ ﷺ أَنَا أَحَقُّ بِمُوسَى مِنْكُمْ قَالَ فَصَامَهُ رَسُولُ اللهِ ﷺ وَأَمَرَ بِصَوْمِهِ  

[Machine] The Messenger of Allah ﷺ arrived in Medina and saw the Jews fasting on the day of Ashura. He asked them, "What is this day that you fast?" They replied, "This is a righteous day, the day on which Allah saved the Children of Israel from their enemy, so Moses fasted it." The Messenger of Allah ﷺ said, "I have more right to Moses than you do." So, the Messenger of Allah ﷺ fasted on that day and commanded others to fast as well.  

قَدِمَ رَسُولُ اللهِ ﷺ الْمَدِينَةَ فَرَأَى الْيَهُودَ يَصُومُونَ يَوْمَ عَاشُورَاءَ فَقَالَ لَهُمْ مَا هَذَا الْيَوْمُ الَّذِي تَصُومُونَهُ؟ قَالُوا هَذَا يَوْمٌ صَالِحٌ هَذَا يَوْمٌ نَجَّى اللهُ فِيهِ بَنِي إِسْرَائِيلَ مِنْ عَدُوِّهِمْ فَصَامَهُ مُوسَى عَلَيْهِ السَّلامُ فَقَالَ رَسُولُ اللهِ ﷺ أَنَا أَحَقُّ بِمُوسَى مِنْكُمْ فَصَامَهُ رَسُولُ اللهِ ﷺ وَأَمَرَ بِصَوْمِهِ  

“The Prophet ﷺ came to Al- Madinah, and he found the Jews observing a fast. He said: ‘What is this?’ They said: ‘This is the day when Allah saved Musa and drowned Pharaoh, so Musa fasted this day in gratitude.’ The Messenger of Allah ﷺ said: ‘We have more right to Musa than you do.’ So he fasted (that day) and enjoined (others) to fast it also.’” (Using translation from Ibn Mājah 1734)   

قَدِمَ رَسُولُ اللهِ ﷺ الْمَدِينَةَ فَوَجَدَ يَهُودَ يَصُومُونَ يَوْمَ عَاشُورَاءَ فَقَالَ مَا هَذَا؟ فَقَالُوا هَذَا يَوْمٌ عَظِيمٌ يَوْمَ نَجَّى اللهُ مُوسَى وَأَغْرَقَ آلَ فِرْعَوْنَ فَصَامَهُ مُوسَى شُكْرًا قَالَ النَّبِيُّ ﷺ فَإِنِّي أَوْلَى بِمُوسَى وَأَحَقُّ بِصِيَامِهِ فَصَامَهُ وَأَمَرَ بِصِيَامِهِ  

[Machine] The Messenger of Allah ﷺ arrived and found the Jews fasting on the day of Ashura. He asked them, "What is this?" They replied, "It is a great day on which Allah saved Moses and drowned Pharaoh and his people. Moses fasted on this day out of gratitude to Allah." The Messenger of Allah ﷺ said, "I have more right to Moses than you. Therefore, I will fast on this day." He then fasted and ordered his companions to fast as well.  

قَدِمَ رَسُولُ اللَّهِ ﷺ فَوَجَدَ يَهُودَ يَصُومُونَ يَوْمَ عَاشُورَاءَ فَقَالَ لَهُمْ «مَا هَذَا» قَالُوا يَوْمٌ عَظِيمٌ نَجَّى اللَّهُ فِيهِ مُوسَى وَأَغْرَقَ آلَ فِرْعَوْنَ فَصَامَهُ مُوسَى شُكْرًا لِلَّهِ فَقَالُ رَسُولُ اللَّهِ ﷺ «أَنَا أَوْلَى بِمُوسَى وَأَحَقُّ بِصِيَامِهِ مِنْكُمْ» فَصَامَهُ وَأَمَرَ بِصِيَامِهِ  

[Machine] The Prophet ﷺ came and found the Jews fasting on the day of Ashura. He asked, "What is the significance of this day?" They replied, "This is the day when Allah saved Moses and drowned the people of Israel, so we fast it out of gratitude and commemorate it."  

قَدِمَ النَّبِيُّ ﷺ فَإِذَا الْيَهُودُ يَصُومُونَ يَوْمَ عَاشُورَاءَ فَقَالَ «مَا بَالُ هَذَا الْيَوْمِ؟» قَالَ «يَوْمٌ أَنْجَى اللهُ فِيهِ مُوسَى وَأَغْرَقَ بَنِي إِسْرَائِيلَ فَنَحْنُ أَحَقُّ بِمُوسَى فَصَامَهُ وَأَمَرَ بِصِيَامِهِ»