The washing of the body parts (i.e., the parts which are washed in ablution) once only while performing ablution

Narrated Ibn 'Abbas:

The Prophet performed ablution by washing the body parts only once.

حَدَّثَنَا مُحَمَّدُ بْنُ يُوسُفَ، قَالَ حَدَّثَنَا سُفْيَانُ، عَنْ زَيْدِ بْنِ أَسْلَمَ، عَنْ عَطَاءِ بْنِ يَسَارٍ، عَنِ ابْنِ عَبَّاسٍ، قَالَ تَوَضَّأَ النَّبِيُّ ﷺ مَرَّةً مَرَّةً.