The Book of Prayers
حَدَّثَنَا يَحْيَى بْنُ يَحْيَى، قَالَ قَرَأْتُ عَلَى مَالِكٍ عَنِ ابْنِ شِهَابٍ، عَنْ سَعِيدِ بْنِ الْمُسَيَّبِ، عَنْ أَبِي هُرَيْرَةَ، . أَنَّ سَائِلاً، سَأَلَ رَسُولَ اللَّهِ صلى الله عليه وسلم عَنِ الصَّلاَةِ فِي الثَّوْبِ الْوَاحِدِ فَقَالَ " أَوَلِكُلِّكُمْ ثَوْبَانِ " .Abu Huraira reported:An inquirer asked the Messenger of Allah (ﷺ) about the prayer in a single garment. He (the Holy Prophet) add: Has everyone of you two garments?
From Sahih Muslim, whose reports the scholars accept as authentic.