Muwatta Malik #1859
Hair
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، عَنْ زِيَادِ بْنِ سَعْدٍ، عَنِ ابْنِ شِهَابٍ، أَنَّهُ سَمِعَهُ يَقُولُ سَدَلَ رَسُولُ اللَّهِ صلى الله عليه وسلم نَاصِيَتَهُ مَا شَاءَ اللَّهُ ثُمَّ فَرَقَ بَعْدَ ذَلِكَ . قَالَ مَالِكٌ لَيْسَ عَلَى الرَّجُلِ يَنْظُرُ إِلَى شَعَرِ امْرَأَةِ ابْنِهِ أَوْ شَعَرِ أُمِّ امْرَأَتِهِ بَأْسٌ .
Yahya related to me from Malik that Ziyad ibn Sad heard Ibn
Shihab say, "The Messenger of Allah, may Allah bless him and grant him
peace, let his hair hang down his forehead as Allah willed, and
afterwards he parted it."
Malik said, "There is no harm in a
man's looking at the hair of his son's wife or the hair of his wife's
mother."
About Muwatta Malik
This hadith is #1859 from Muwatta Malik, in the Book of Hair.