عَنْ أَبِي أَيُّوبَ الْأَنْصَارِيِّ رَضِيَ اللَّهُ عَنْهُ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ كَانَ إِذَا تَوَضَّأَ تَمَضْمَضَ وَمَسَحَ لِحْيَتَهُ مِنْ تَحْتِهَا بِالْمَاءِ
It is narrated from Sayyiduna Abu Ayyub Ansari (may Allah be pleased with him) that when the Messenger of Allah (peace and blessings be upon him) performed ablution, he would rinse his mouth and use water to comb through his beard from underneath.