O Allah, You have beautified my creation, so beautify my character. (When lookin — Looking in Mirror
اللَّهُمَّ أَنْتَ حَسَّنْتَ خَلْقِي فَحَسِّنْ خُلُقِي
Transliteration: Allaahumma anta hassanta khalqee fahassin khuluqee
Translation: O Allah, You have beautified my creation, so beautify my character. (When looking in a mirror)
Reference: Ahmad 1:403, Ibn Hibban