Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
ahmad:7515ʿAbd al-Aʿlá > Maʿmar > al-Zuhrī > Abū Salamahaʿan Abū Hurayrah

[Machine] The prayer was being held when the Messenger of Allah ﷺ arrived. He stood in his designated spot and mentioned that he hadn't performed ablution, so he left and then returned. He said, "Just as you are, line up behind me." He came forward and his head was dripping with water, so he prayed alongside us.  

أحمد:٧٥١٥حَدَّثَنَا عَبْدُ الْأَعْلَى عَنْ مَعْمَرٍ عَنِ الزُّهْرِيِّ عَنْ أَبِي سَلَمَةَعَنْ أَبِي هُرَيْرَةَ قَالَ

أُقِيمَتِ الصَّلَاةُ فَجَاءَ رَسُولُ اللهِ ﷺ فَقَامَ فِي مُصَلَّاهُ فَذَكَرَ أَنَّهُ لَمْ يَغْتَسِلْ فَانْصَرَفَ ثُمَّ قَالَ كَمَا أَنْتُمْ فَصَفَفْنَا فَجَاءَ وَإِنَّ رَأْسَهُ لَيَنْطِفُ فَصَلَّى بِنَا