The Messenger of Allah ﷺ applied kohl while he was fasting.
حدثنا أبو التقي هشام بن عبد الملك الحمصي حدثنا بقية حدثنا الزبيدي عن هشام بن عروة عن أبيه
اكتحل رسول الله ﷺ وهو صائم
No references are available.
[Its chain of transmission is daif]. Busiri said, "Its chain of transmission is daif due to the weakness of Zubaydi, whose name is Saeed bin Abdul-Jabbar, as Abu Bakr bin Abu Dawud made clear, and Allah knows best." This Zubaydi is daif, and Jareer used to call him a liar (Taqrib).