157 - It was narrated that Ibn ‘Abbas said: The Prophet (blessings and peace of Allah be upon him) did wudu’ washing each part once..

Commentary : The Prophet (blessings and peace of Allah be upon him) used to make things easy for his ummah, and explained to them what it was permissible to do when purifying oneself and doing wudu’, and what was sufficient in that regard.
In this hadith, ‘Abdullah ibn ‘Abbas (may Allah be pleased with him) narrates that the Prophet (blessings and peace of Allah be upon him) did wudu’ washing each part once. This highlights the minimum extent that is required in wudu’, which is an obligation without which prayer is not acceptable.
This hadith indicates that wudu’ is acceptable if each part is washed once. It is proven that the Prophet (blessings and peace of Allah be upon him) also washed each part twice, as is mentioned in the hadith of ‘Abdullah ibn Zayd that was narrated by al-Bukhari, according to which the Prophet (blessings and peace of Allah be upon him) did wudu’ washing each part twice. But the Sunnah when doing wudu’, and the most perfect way of doing it, is to wash each part three times, as mentioned in the hadith of ‘Uthman ibn ‘Affan that was narrated by al-Bukhari..