"My father told me that he heard the Messenger of Allah say, when mention was made in his presence of a man who fasted for the rest of his life: 'He neither fasted nor broke his fast."' 'Ata said: "someone who heard him told me that Ibn 'Umar (said) that the Prophet said: 'Whoever fasts every day of his life, then he has not fasted." (Using translation from Nasāʾī 2380)

أَنَّهُ سَمِعَ رَسُولَ اللهِ ﷺ وَذُكِرَ عِنْدَهُ رَجُلٌ يَصُومُ الدَّهْرَ فَقَالَ «لَا صَامَ وَلَا أَفْطَرَ»