وَحَدَّثَنِي عَنْ مَالِكٍ، عَنِ الصَّلْتِ بْنِ زُيَيْدٍ، عَنْ غَيْرِ، وَاحِدٍ، مِنْ أَهْلِهِ أَنَّ عُمَرَ بْنَ الْخَطَّابِ، وَجَدَ رِيحَ طِيبٍ وَهُوَ بِالشَّجَرَةِ وَإِلَى جَنْبِهِ كَثِيرُ بْنُ الصَّلْتِ فَقَالَ عُمَرُ مِمَّنْ رِيحُ هَذَا الطِّيبِ فَقَالَ كَثِيرٌ مِنِّي يَا أَمِيرَ الْمُؤْمِنِينَ لَبَّدْتُ رَأْسِي وَأَرَدْتُ أَنْ لاَ أَحْلِقَ ‏.‏ فَقَالَ عُمَرُ فَاذْهَبْ إِلَى شَرَبَةٍ فَادْلُكْ رَأْسَكَ حَتَّى تُنَقِّيَهُ ‏.‏ فَفَعَلَ كَثِيرُ بْنُ الصَّلْتِ ‏.‏ قَالَ مَالِكٌ الشَّرَبَةُ حَفِيرٌ تَكُونُ عِنْدَ أَصْلِ النَّخْلَةِ ‏.‏

Yahya related to me from Malik from as-Salt ibn Zubayd from morethan one of his family that Umar ibn al-Khattab discovered the smellof perfume while he was at ash-Shajara. Kathir ibn as-Salt was at hisside, and Umar asked, "Who is this smell of perfume coming from?", andKathir said, "From me, amir al-muminin. I matted my hair with perfumeand I intended not to shave it.'' Umar said, "Go to a sharaba and rubyour head until it is clean," and Kathir did so. Malikexplained, "A sharaba is the ditch at the base of a date-palm." Translation Not Available

Book Ref: Muwatta Imam Malik Book 20 Hadith 729
Web Ref:  Muwatta Imam Malik Book 20 Hadith 20