Abu Hurairah (May Allah be pleased with him) said:
The Messenger of Allah (ﷺ) said, "None of you should walk wearing one shoe; you should either wear them both or take them off both."[Al- Bukhari and Muslim]. (ID)
App reference (ID): Book 18, Hadith 139 (ID)
Arabic/English book reference (ID): Book 18, Hadith 1649 (ID)