al-Ala' bin 'Abdur Rahman bin Ya'qub العلاء بن عبد الرحمن · Chapters on Medicine

"Use this black seed. For indeed it contains a cure for every disease except As-Sam" And As-Sam is death.

“I heard the Messenger of Allah (ﷺ) say: ‘You should use antimony when you go to sleep, for it improves the eyesight and makes the hair (eyelashes) grow.’”