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. (Using translation from Abū Dāʾūd 3878)
"البَسُوا من ثِيَابِكم البَيَاضَ؛ فإِنَّها من خيرِ ثيابكم، وكَفِّنُوا فيها موتاكم، وإنَّ من خير أكْحَالِكُمْ الإِثْمدَ، فإِنَّهُ يجلو البصرَ، ويُنْبِتُ الشَّعَرَ" .