'Umar ibn al-Khattab said, "When the Prophet, may Allah bless him and grant him peace, withdrew from his wives, I was with Rabah, the slave of the Messenger of Allah, may Allah bless him and grant him peace, and I called, 'Rabah, ask permission for me to come in to the Messenger of Allah, may Allah bless him and grant him peace.'"  

حَدَّثَنِي عُمَرُ بْنُ الْخَطَّابِ رَضِيَ اللَّهُ عَنْهُ قَالَ لَمَّا اعْتَزَلَ النَّبِيُّ ﷺ نِسَاءَهُ فَإِذَا أَنَا بِرَبَاحٍ غُلاَمِ رَسُولِ اللهِ ﷺ فَنَادَيْتُ يَا رَبَاحُ اسْتَأْذِنْ لِي عَلَى رَسُولِ اللهِ ﷺ