"It was said: 'O Messenger of Allah, so and so never broke his fast, even for one day for the rest of his life.' He said: 'He has neither fasted nor broken 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 2379)
قِيلَ لِرَسُولِ اللهِ ﷺ إِنَّ فُلَانًا لَا يُفْطِرُ نَهَارًا الدَّهْرَ قَالَ لَا أَفْطَرَ وَلَا صَامَ