On going harder than you can sustain
They tried to copy a practice of his and he stopped them.
إِنِّي أَبِيتُ يُطْعِمُنِي رَبِّي وَيَسْقِينِ، فَاكْلَفُوا مِنَ الْعَمَلِ مَا تُطِيقُونَ
Do not practise continuous fasting. They said: but you do. He said: I am not like you. I spend the night and my Lord feeds me and gives me drink. So take on of deeds what you can bear.
The full narration
Narrated Abu Huraira:The Prophet (ﷺ) said twice, "(O you people) Be cautious! Do not practice Al-Wisal." The people said to him, "But you practice Al-Wisal?" The Prophet (ﷺ) replied, "My Lord gives me food and drink during my sleep. Do that much of deeds which is within your ability
Source
Ṣaḥīḥ al-Bukhārī · 1966
Ṣaḥīḥ
- Agreed upon as authentic (al-Bukhārī / Muslim)