ENOfficial
It was narrated that Qais bin Sa’d said: “The Prophet (ﷺ) came to us and we gave him some water with which to cool down. He bathed, then I brought him a yellow blanket, and I saw the traces of Wars (the yellow dye) on the folds of his stomach.”
Source: sunnah.com
Other translations
Arabic
حَدَّثَنَا عَلِيُّ بْنُ مُحَمَّدٍ، حَدَّثَنَا وَكِيعٌ، عَنِ ابْنِ أَبِي لَيْلَى، عَنْ مُحَمَّدِ بْنِ عَبْدِ الرَّحْمَنِ، عَنْ مُحَمَّدِ بْنِ شُرَحْبِيلَ، عَنْ قَيْسِ بْنِ سَعْدٍ، قَالَ أَتَانَا النَّبِيُّ ـ صلى الله عليه وسلم ـ فَوَضَعْنَا لَهُ مَاءً يَتَبَرَّدُ بِهِ فَاغْتَسَلَ ثُمَّ أَتَيْتُهُ بِمِلْحَفَةٍ صَفْرَاءَ فَرَأَيْتُ أَثَرَ الْوَرْسِ عَلَى عُكَنِهِ .
sunnah.com