Muwatta Malik #1324
Divorce
The Arabic includes the chain of narration (sanad) and the collector's commentary; the English translation shows the Prophet's words only.
وَحَدَّثَنِي عَنْ مَالِكٍ، أَنَّهُ بَلَغَهُ أَنَّ أُمَّ سَلَمَةَ، زَوْجَ النَّبِيِّ صلى الله عليه وسلم قَالَتْ لاِمْرَأَةٍ حَادٍّ عَلَى زَوْجِهَا اشْتَكَتْ عَيْنَيْهَا فَبَلَغَ ذَلِكَ مِنْهَا اكْتَحِلِي بِكُحْلِ الْجِلاَءِ بِاللَّيْلِ وَامْسَحِيهِ بِالنَّهَارِ .
Yahya related to me from Malik that he had heard that Umm Salama,
the wife of the Prophet, may Allah bless him and grant him peace, said
to a woman in mourning for her husband whose eyes were troubling her
and the pain had become very strong, "Apply jala kohl at night and
wipe it off in the day."
About Muwatta Malik
This hadith is #1324 from Muwatta Malik, in the Book of Divorce.