“Whoever applies kohl, let him do it an odd number of times. Whoever does that has done well, and whoever does not, it does not matter.”  

أَنَّ النَّبِيَّ ﷺ قَالَ مَنِ اكْتَحَلَ فَلْيُوتِرْ مَنْ فَعَلَ فَقَدْ أَحْسَنَ وَمَنْ لاَ فَلاَ حَرَجَ  

“The Prophet ﷺ had a kohl container from which he would apply kohl three times, to each eye.”  

كَانَتْ لِلنَّبِيِّ ﷺ مُكْحُلَةٌ يَكْتَحِلُ مِنْهَا ثَلاَثًا فِي كُلِّ عَيْنٍ