Kohl

Ibn al-Qayyim رحمه الله said: "Kohl protects the health of the eyes and gives strength and clarity of vision, and cleanses they eye of bad substances. In addition to that some types of kohl also serve as an adornment and if it is applied before going to bed this is even better. And ithmid is more efficacious than other types of kohl."

(Zaad al-Ma’aad, 4/281)

It says in al-Mughni: It is mustahabb to use kohl an odd number of times. (al-Mughni, 1/106)

It says in al-Majmoo’: With regard to using kohl an odd number of times, there is a difference of scholarly opinion. It was said that it should be applied an odd number of times to one eye and an even number of times to the other, so that the total number will be odd. The correct view of the scholars who examined this issue is that it should be applied an odd number of times to each eye. Based on this, the Sunnah is to apply it three times to each eye. (al-Majmoo’, 1/334)

(Note: The bottle in the picture is not real kohl. Real kohl is a black & shiny silver powder. If it is not black & shiny silver coloured it is NOT real kohl ithmid as used by the Prophet ﷺ and should be avoided as most eye make up contains lead and other dangerous cancer causing chemicals)