It wasnarrated from Abu Hurairah that the Messenger of Allah (ﷺ)said;"None of you should walk in one sandal or in one leather sock.Lethim take them both off or walk in both of them." (RU)
English reference (RU): Vol. 4, Book 32, Hadith 3617 (RU)
Arabic reference (RU): Book 32, Hadith 3748 (RU)