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Abu Huraira reported Allah's Messenger (ﷺ) as saying: "When one of you puts on sandals, he should first put in the right foot, and when he takes off he should take off the left one first. And he should wear both of them or take both off."
Source: sunnah.com
Other translations
Arabic
حَدَّثَنَا عَبْدُ الرَّحْمَنِ بْنُ سَلاَّمٍ الْجُمَحِيُّ، حَدَّثَنَا الرَّبِيعُ بْنُ مُسْلِمٍ، عَنْ مُحَمَّدٍ، - يَعْنِي ابْنَ زِيَادٍ - عَنْ أَبِي هُرَيْرَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " إِذَا انْتَعَلَ أَحَدُكُمْ فَلْيَبْدَأْ بِالْيُمْنَى وَإِذَا خَلَعَ فَلْيَبْدَأْ بِالشِّمَالِ وَلْيُنْعِلْهُمَا جَمِيعًا أَوْ لِيَخْلَعْهُمَا جَمِيعًا " .
sunnah.com