حَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، أَنَّهُ بَلَغَهُ أَنَّ عُمَرَ بْنَ الْخَطَّابِ، وَهَبَ لاِبْنِهِ جَارِيَةً فَقَالَ لاَ تَمَسَّهَا فَإِنِّي قَدْ كَشَفْتُهَا ‏.‏

Yahya related to me from Malik that he had heard that Umar ibnal-Khattab gave his son a slave-girl and said, "Do not touch her, forI have uncovered her." Translation Not Available

Book Ref: Muwatta Imam Malik Book 28 Hadith 1130
Web Ref:  Muwatta Imam Malik Book 28 Hadith 36