Sunan Abi Dawud 20853
In-book no 349حَدَّثَنَا مَحْمُودُ بْنُ خَالِدٍ الدِّمَشْقِيُّ، أَخْبَرَنَا مَرْوَانُ، حَدَّثَنَا عَلِيُّ بْنُ حَوْشَبٍ، قَالَ سَأَلْتُ مَكْحُولاً عَنْ هَذَا الْقَوْلِ، " غَسَّلَ وَاغْتَسَلَ " . فَقَالَ غَسَّلَ رَأْسَهُ وَغَسَلَ جَسَدَهُ .
Makhul was asked about the meaning of words ghassala and ightasala (that occur in tradition 345) and he said: one should was one's head and body well (and not than one should makes one's wife wash).