The Messenger of Allah (ﷺ) forbade that a man should put on sandals while standing.
Sunan Abi Dawud Book 34, Hadith 116
← Previous Hadith The sandals of the Prophet (ﷺ) had two thongs.

Sunan Abi Dawud Book 34, Hadith 115 Next Hadith → The Messenger of Allah (ﷺ) as saying: None of you should walk with one sandal, but should wear a pair or should put off both of them.

Sunan Abi Dawud Book 34, Hadith 117