Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
bayhaqi:15455ʿUmar b. ʿAbd al-ʿAzīz b. ʿUmar b. Qatādah > Abū ʿAmr b. Nujayd > Muḥammad b. Ibrāhīm al-Būshanjī > Ibn Bukayr > Mālik > Nāfiʿ > ʿAbdullāh b. ʿUmar ؓ

[Machine] He used to say that the waiting period for a free woman is three menstrual periods and the waiting period for a slave woman is two menstrual periods. The scholar said, and it has been narrated by someone other than Ibn Umar, and it is not considered authentic.  

البيهقي:١٥٤٥٥أَخْبَرَنَا عُمَرُ بْنُ عَبْدِ الْعَزِيزِ بْنِ عُمَرَ بْنِ قَتَادَةَ أنا أَبُو عَمْرِو بْنُ نُجَيْدٍ نا مُحَمَّدُ بْنُ إِبْرَاهِيمَ الْبُوشَنْجِيُّ نا ابْنُ بُكَيْرٍ نا مَالِكٌ عَنْ نَافِعٍ عَنْ عَبْدِ اللهِ بْنِ عُمَرَ ؓ

أَنَّهُ كَانَ يَقُولُ عِدَّةُ الْحُرَّةِ ثَلَاثُ حِيَضٍ وَعِدَّةُ الْأَمَةِ حَيْضَتَانِ قَالَ الشَّيْخُ وَقَدْ رَفَعَهُ غَيْرُهُ عَنِ ابْنِ عُمَرَ ؓ وَلَيْسَ بِصَحِيحٍ