Sunan Abi Dawud, Hadith 144 ⓘ
The version of Ibn Juraij has the working: “If you perform ablution, then rinse your mouth.”
حَدَّثَنَا مُحَمَّدُ بْنُ يَحْيَى بْنِ فَارِسٍ، حَدَّثَنَا أَبُو عَاصِمٍ، حَدَّثَنَا ابْنُ جُرَيْجٍ، بِهَذَا الْحَدِيثِ قَالَ فِيهِ " إِذَا تَوَضَّأْتَ فَمَضْمِضْ " .
also referenced under: Hadith 144 (DarusSalam) & Book 1, Hadith 144 (USC-MSA)