The Messenger of Allah ﷺ used to command us to fast the days of the white (nights): thirteenth, fourteenth and fifteenth of the month. He said: This is like keeping perpetual fast. (Using translation from Abū Dāʾūd 2449)   

كَانَ رَسُولُ اللهِ ﷺ يَأْمُرُ بِصِيَامِ لَيَالِي الْبِيضِ ثَلَاثَ عَشْرَةَ وَأَرْبَعَ عَشْرَةَ وَخَمْسَ عَشْرَةَ وَقَالَ هِيَ كَصَوْمِ الدَّهْرِ  

[Machine] "And the Messenger of Allah ﷺ wiped his face."  

وَكَانَ رَسُولُ اللهِ ﷺ مَسَحَ عَلَى وَجْهِهِ  

[Machine] He narrated to us Mo'tamir and mentioned his likeness.  

حَدَّثَنَا مُعْتَمِرٌ فَذَكَرَ مِثْلَهُ  

[Machine] The translation of the passage into English is:

"The Messenger of Allah, ﷺ , used to command them to fast the white days and he would say, 'They are the fasting of the month,' or he said, 'of the lifetime.'"  

أَنَّ رَسُولَ اللهِ ﷺ كَانَ يَأْمُرُهُمْ بِصِيَامِ أَيَّامِ الْبِيضِ وَيَقُولُ هُنَّ صِيَامُ الشَّهْرِ أَوْ قَالَ الدَّهْرِ  

The Messenger of Allah ﷺ used to command us to fast the days of the white (nights): thirteenth, fourteenth and fifteenth of the month. He said: This is like keeping perpetual fast. (Using translation from Abū Dāʾūd 2449)  

كَانَ رَسُولُ اللهِ ﷺ يَأْمُرُنَا أَنْ نَصُومَ اللَّيَالِي الْبِيضَ ثَلَاثَ عَشْرَةَ وَأَرْبَعَ عَشْرَةَ وَخَمْسَ عَشْرَةَ وَقَالَ هُنَّ كَهَيْئَةِ الدَّهْرِ  

[Machine] And he was among the companions of the Messenger of Allah ﷺ who said: The Messenger of Allah ﷺ used to command us to fast the three white days (13th, 14th, and 15th of each lunar month) and he would say, "These are the fasting of a lifetime."  

وَكَانَ مِنْ أَصْحَابِ رَسُولِ اللهِ ﷺ قَالَ كَانَ رَسُولُ اللهِ ﷺ يَأْمُرُنَا بِصِيَامِ أَيَّامِ الْبِيضِ الثَّلَاثَةِ وَيَقُولُ هُنَّ صِيَامُ الدَّهْرِ