[Machine] The Messenger of Allah ﷺ used to wake up in a state of Janaba (ritual impurity due to sexual activity) without having a wet dream, and he would continue fasting. This was narrated by Abdullah bin Al-Mubarak.  

كَانَ رَسُولُ اللهِ ﷺ «يُصْبِحُ جُنُبًا مِنْ غَيْرِ حُلْمٍ ثُمَّ يَظَلُّ صَائِمًا» تَابَعَهُ عَبْدُ اللهِ بْنُ الْمُبَارَكِ  

[Machine] The Messenger of Allah ﷺ would sometimes wake up in a state of sexual impurity without having had a wet dream, and he would still observe fasting on that day.  

كَانَ رَسُولُ اللهِ ﷺ «يُصْبِحُ جُنُبًا مِنْ غَيْرِ حُلْمٍ ثُمَّ يَصُومُ ذَلِكَ الْيَوْمَ»