[Machine] I asked the Messenger of Allah ﷺ about the mazi (pre-seminal fluid) for the sake of Fatimah, so I ordered a man to ask him and he said about it that it invalidates wudhu according to the two Sahihs (al-Bukhari and Muslim) from the hadith of Shu'bah.
أَنْ أَسْأَلَ رَسُولَ اللهِ ﷺ عَنِ الْمَذْيِ مِنْ أَجْلِ فَاطِمَةَ فَأَمَرْتُ رَجُلًا فَسَأَلَهُ فَقَالَ فِيهِ الْوُضُوءُ مُخَرَّجٌ فِي الصَّحِيحَيْنِ مِنْ حَدِيثِ شُعْبَةَ