وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ نَافِعٍ، عَنْ أَسْلَمَ، مَوْلَى عُمَرَ بْنِ الْخَطَّابِ أَنَّ عُمَرَ بْنَ الْخَطَّابِ، وَجَدَ رِيحَ طِيبٍ وَهُوَ بِالشَّجَرَةِ فَقَالَ مِمَّنْ رِيحُ هَذَا الطِّيبِ فَقَالَ مُعَاوِيَةُ بْنُ أَبِي سُفْيَانَ مِنِّي يَا أَمِيرَ الْمُؤْمِنِينَ ‏.‏ فَقَالَ مِنْكَ لَعَمْرُ اللَّهِ فَقَالَ مُعَاوِيَةُ إِنَّ أُمَّ حَبِيبَةَ طَيَّبَتْنِي يَا أَمِيرَ الْمُؤْمِنِينَ ‏.‏ فَقَالَ عُمَرُ عَزَمْتُ عَلَيْكَ لَتَرْجِعَنَّ فَلْتَغْسِلَنَّهُ ‏.‏

Yahya related to me from Malik from Nafi from Aslam, the mawla ofUmar ibn al Khattab, that Umar ibn al-Khattab discovered the smell ofperfume while he was at ash-Shajara, and he asked, "Who is this smellof perfume coming from?" Muawiya ibn Abi Sufyan answered, "From me,amir al-muminin." Umar said, "From you? By the life of Allah!" Muawiyaexplained, "Umm Habiba perfumed me, amir al-muminin. "'Umar then said,"You must go back and wash it off." Translation Not Available

Book Ref: Muwatta Imam Malik Book 20 Hadith 728
Web Ref:  Muwatta Imam Malik Book 20 Hadith 19