The Prophet (ﷺ) performed ablution by washing the body parts only once.
Sahih al-Bukhari Book 4, Hadith 23
← Previous Hadith The Prophet (ﷺ) went out to answer the call of nature and asked me to bring three stones. I found two stones and searched for the third but could not find it. So took a dried piece of dung and brought it to him. He took the two stones and threw away the dung and said, "This is a filthy thing."

Sahih al-Bukhari Book 4, Hadith 22 Next Hadith → The Prophet (ﷺ) performed ablution by washing the body parts twice.

Sahih al-Bukhari Book 4, Hadith 24