I visited 'Umar and he reached out and hit his wife. He said : O: Ash'ath, learn from me three things that I learned from the Messenger of Allah ﷺ: Do not ask a man why he hit his wife, do not sleep until you pray Witr - and I forgot the third thing
وَقَالَ يَا أَشْعَثُ احْفَظْ عَنِّي ثَلاثًا حَفِظْتُهُنَّ عَنْ رَسُولِ اللهِ ﷺ لَا تَسْأَلِ الرَّجُلَ فِيمَ ضَرَبَ امْرَأَتَهُ وَلا تَنَمْ إِلَّا عَلَى وَتْرٍ وَنَسِيتُ الثَّالِثَةَ
[Machine] From the Prophet of Allah ﷺ : Do not ask a man about how he struck his wife, and do not sleep except on a mattress. I forgot the third part, and someone else narrated from Abu Dawood in this chain, from Abdulrahman Al-Musliy.
عَنْ رَسُولِ اللهِ ﷺ لَا تَسْأَلِ الرَّجُلَ فِيمَ ضَرَبَ امْرَأَتَهُ وَلَا تَنَامَنَّ إِلَّا عَلَى وِتْرٍ وَنَسِيتُ الثَّالِثَةَ وَقَالَ غَيْرُهُ عَنْ أَبِي دَاوُدَ فِي هَذَا الْإِسْنَادِ عَنْ عَبْدِ الرَّحْمَنِ الْمُسْلِيِّ
"عَنْ الأَشْعَث بْنِ قَيْسٍ قَالَ: ضَيَّفْتُ عُمَرَ بْنَ الْخَطَّابِ، فَقَالَ: يَا أَشْعَثُ: احْفَظْ عَنِّى ثَلاثًا حَفِظْتُهُنَّ عَنْ رَسُولِ اللَّه ﷺ : لَا تَسْأَلِ الرَّجُلَ فِيمَ ضَرَبَ امْرَأَتَهُ، وَلَا تَنَامَنَّ إِلَّا عَلَى وِتْرٍ، وَنَسِيتُ الثَّالِثَةَ".