Sunan an-Nasa'i, Volume 4, Book 27, Hadith 3565 (DarusSalam) ⓘ
It was narrated from Safiyyah bint Shaibah, from Umm Salamah, the wife of the Prophet, that the Prophet said: "The woman whose husband has died should not wear clothes that are dyed with safflower or red clay, and she should not use dye nor kohl."
أَخْبَرَنَا مُحَمَّدُ بْنُ إِسْمَاعِيلَ بْنِ إِبْرَاهِيمَ، قَالَ حَدَّثَنَا يَحْيَى بْنُ أَبِي بُكَيْرٍ، قَالَ حَدَّثَنَا إِبْرَاهِيمُ بْنُ طَهْمَانَ، قَالَ حَدَّثَنِي بُدَيْلٌ، عَنِ الْحَسَنِ بْنِ مُسْلِمٍ، عَنْ صَفِيَّةَ بِنْتِ شَيْبَةَ، عَنْ أُمِّ سَلَمَةَ، زَوْجِ النَّبِيِّ صلى الله عليه وسلم عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ " الْمُتَوَفَّى عَنْهَا زَوْجُهَا لاَ تَلْبَسُ الْمُعَصْفَرَ مِنَ الثِّيَابِ وَلاَ الْمُمَشَّقَةَ وَلاَ تَخْتَضِبُ وَلاَ تَكْتَحِلُ " .
also referenced under: Hadith 3535 (Reference) & Book 27, Hadith 149 (In-Book)