That the Messenger of Allah used to fast continually and it ws said that he would not break his fast, and he used not to fast and it was said that he would not fast.
أَنَّ رَسُولَ اللَّهِ ﷺ كَانَ يَسْرُدُ الصَّوْمَ فَيُقَالُ لاَ يُفْطِرُ وَيُفْطِرُ فَيُقَالُ لاَ يَصُومُ
I asked Sa'id b. Jubair about fasting during Rajab. He said: Ibn 'Abbas told me that the Messenger of Allah ﷺ used to fast to such an extent that we thought that he would never break his fast; and he would go without fasting to such an extent that we thought he would never fast.
أَنَّ رَسُولَ اللَّهِ ﷺ كَانَ يَصُومُ حَتَّى نَقُولَ لاَ يُفْطِرُ وَيُفْطِرُ حَتَّى نَقُولَ لاَ يَصُومُ
I asked Sa'id b. Jubair about fasting during Rajab. He said: Ibn 'Abbas told me that the Messenger of Allah ﷺ used to fast to such an extent that we thought that he would never break his fast; and he would go without fasting to such an extent that we thought he would never fast. (Using translation from Abū Dāʾūd 2430)
أَنَّ رَسُولَ اللهِ ﷺ كَانَ يَصُومُ حَتَّى نَقُولَ لَا يُفْطِرُ وَيُفْطِرُ حَتَّى نَقُولَ لَا يَصُومُ
That the Messenger of Allah used to fast continually and it ws said that he would not break his fast, and he used not to fast and it was said that he would not fast. (Using translation from Nasāʾī 2359)
أَنَّ رَسُولَ اللهِ ﷺ «كَانَ يَسْرُدُ الصَّوْمَ» فَيُقَالُ لَا يُفْطِرُ وَيُفْطِرُ فَيُقَالُ لَا يَصُومُ
"أَنَّ رَسُولَ الله ﷺ : كَانَ يَسْرُدُ الصَّوْمَ فَيُقَالُ: لاَ يُفْطِرُ وَيُفْطِرُ فَيُقَالُ: لاَ يَصُومُ".