Is it permissible not to adhere to the same number of times when washing each limb during ablution?

It is permissible to perform ablution by washing some limbs once, some twice, and some thrice, as Muslims have unanimously agreed that washing the limbs once is obligatory, and thrice is a Sunnah. Authentic hadiths have been reported confirming the permissibility of washing once, twice, and thrice, and their variation indicates overall permissibility. Washing thrice is completeness, and washing once suffices.