The Messenger of Allah ﷺ said, "The best of your kohls is ithmid. It clears the vision and makes the lashes grow."
حدثنا أبو بكر بن أبي شيبة حدثنا يحيى بن آدم عن سفيان عن ابن خثيم عن سعيد بن جبير
قال رسول الله ﷺ خير أكحالكم الإثمد يجلو البصر وينبت الشعر
[Hasan] Reported by Abu Dawud, Clothing, chapter on white clothing, no. 4061, and Nasai, 8/149-150, Adornment, kohl, no. 5116, from the hadith of Ibn Khusaym, through this route. See also Nayl al-Maqsud, no. 3878.