"I heard the Messenger of Allah say: "Whoever fasts three days of each month has fasted the month in full' or 'will have (the reward of) fasting the month."' 'Asim was in doubt.
سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ مَنْ صَامَ ثَلاَثَةَ أَيَّامٍ مِنْ كُلِّ شَهْرٍ فَقَدْ تَمَّ صَوْمُ الشَّهْرِ أَوْ فَلَهُ صَوْمُ الشَّهْرِ شَكَّ عَاصِمٌ
[Machine] The Prophet ﷺ said, "Whoever fasts three days of every month has fasted the entire year."
عَنِ النَّبِيِّ ﷺ قَالَ مَنْ صَامَ ثَلَاثَةَ أَيَّامٍ مِنْ كُلِّ شَهْرٍ فَقَدْ صَامَ الدَّهْرَ كُلَّهُ
"I heard the Messenger of Allah say: "Whoever fasts three days of each month has fasted the month in full' or 'will have (the reward of) fasting the month."' 'Asim was in doubt. (Using translation from Nasāʾī 2410)
سَمِعْتُ رَسُولَ اللهِ ﷺ يَقُولُ «مَنْ صَامَ ثَلَاثَةَ أَيَّامٍ مِنْ كُلِّ شَهْرٍ فَقَدْ تَمَّ لَهُ صَوْمُ الشَّهْرِ أَوْ فَلَهُ صَوْمُ الشَّهْرِ» شَكَّ عَاصِمٌ
"مَنْ صَامَ ثَلاثةَ أَيَّامٍ مِنْ كُلِّ شَهْرٍ، فَقَدْ صَامَ الدَّهرَ كلَّهُ".
"مَنْ صَامَ ثَلاثَةَ أَيَّامٍ مِنْ كُلِّ شَهْرٍ، فَقَدْ صَامَ الشَّهْرَ كُلَّهُ".