The Prophet ﷺ said: Wear your white garments, for they are among your best garments, and shroud your dead in them. Among the best types of collyrium you use is antimony (ithmid): it clears the vision and makes the hair sprout.  

قَالَ رَسُولُ اللَّهِ ﷺ الْبَسُوا مِنْ ثِيَابِكُمُ الْبَيَاضَ فَإِنَّهَا مِنْ خَيْرِ ثِيَابِكُمْ وَكَفِّنُوا فِيهَا مَوْتَاكُمْ وَإِنَّ خَيْرَ أَكْحَالِكُمُ الإِثْمِدُ يَجْلُو الْبَصَرَ وَيُنْبِتُ الشَّعْرَ