Muwatta Malik 1235
موطأ مالك#1235Sahihوَحَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، عَنِ ابْنِ شِهَابٍ، أَنَّهُ قَالَ بَلَغَنِي أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ لِرَجُلٍ مِنْ ثَقِيفٍ أَسْلَمَ وَعِنْدَهُ عَشْرُ نِسْوَةٍ حِينَ أَسْلَمَ الثَّقَفِيُّ " أَمْسِكْ مِنْهُنَّ أَرْبَعًا وَفَارِقْ سَائِرَهُنَّ " .
Yahya related to me from Malik that Ibn Shihab said, "I have heard that the Messenger of Allah, may Allah bless him and grant him peace, said to a man from Thaqif who had ten wives when he became muslim, 'Take four and separate from the rest
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
In-book reference: 29:32