وَعَنْ أَنَسٍ
قَالَ: جَاءَ رَجُلٌ إِلَى النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ: «اشتكيت عَيْني أَفَأَكْتَحِلُ وَأَنَا صَائِمٌ؟ قَالَ: «نَعَمْ»
Anas told of a man coming to the Prophet (sallallahu alayhi wa sallam) and saying, “I have a complaint in my eyes, so may I apply collyrium while I am fasting?” He replied, “Yes.”
Mishkat al-Masabih 1920, Book 8, Fasting, Hadith 54. 1 min read