COLLYRIUM at Chambers's Cyclopædia, or an Universal Dictionary of Arts and Sciences, Volume 1 page 256, year 1728 https://archive.org/details/Cyclopediachambers-Volume1/page/n409/mode/1up ↩
Sunan Abu-Dawud (Ahmad Hasan translation). Book 32, Number 4050. http://www.muslimaccess.com/sunnah/hadeeth/abudawud/032.html ↩
Hilchot Shabbat 18:2 ↩