And the explanation of the evidence that even the one who washes the limbs of ablution once is called a washer (ghasil). And Allah Almighty has commanded the washing of the limbs of ablution without specifying a quantity. And in the washing of the limbs of ablution by the Prophet Muhammad (peace be upon him) once, twice, and three times, and in washing some limbs an even number of times and some an odd number of times, there is evidence that all these methods are permissible in (ablution). And whoever acts upon any one of the different methods of ablution performed by the Prophet Muhammad (peace be upon him) at different times, he will be considered as having performed the obligatory ablution. Because this is a difference in the permissible (methods) of ablution; it is not such a difference in which some (methods) are permissible and some are forbidden and impermissible.

Sayyiduna Ibn Abbas (may Allah be pleased with them both) narrates that I saw the Messenger of Allah (peace and blessings be upon him), he performed ablution washing each part once.