The Prophet (may Allah’s peace and blessings be upon him) performed ablution by washing the body parts twice

Explanation

When the Prophet (may Allah's peace and blessings be upon him) performed ablution, he would sometimes wash each body part of the parts of ablution once - washing the face - including rinsing the mouth and sniffing water into the nostrils - and the hands and feet twice.

Lessons from the hadith

• It is obligatory to wash the body parts of ablution at least once. However, more than once is recommended.
• It is permissible to sometimes wash the body parts of ablution twice.
• It is prescribed to wipe over the head once.