Muhammad bin 'Abdullah bin al-Zubair محمد بن عبد الله أبو أحمد الزبيري · Chapters on Medicine

"Indeed the best of what you treat is As-Sa'ut, Al-Ladud, cupping and laxatives.' And the best of what you use for Kuhl is Ithmid, for it clears the vision and grows the hair (eye-lashes)." And he said:" The Messenger of Allah (s.a.w) had a Kuhl holder with which he would apply Kuhl before sleeping three in each eye."

"It was narrated to me that Abu Hurairah said: 'I took three truffles, or five, or seven, and pressed them. Then I put their liquid in a bottle, and I used it on the eyes of a slave girl of mine so she was cured.'"