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.
darimi:1094Abū Nuʿaym > Abū Hilāl > Shaybah b. Hishām al-Rāsibī > Saʾalt Sālim b. ʿAbdullāh

[Machine] About the man who has intercourse with his wife while she is menstruating on the same blanket, he said, "As for us, the family of Umar, we avoid them when they are menstruating."  

الدارمي:١٠٩٤أَخْبَرَنَا أَبُو نُعَيْمٍ حَدَّثَنَا أَبُو هِلَالٍ حَدَّثَنِي شَيْبَةُ بْنُ هِشَامٍ الرَّاسِبِيُّ قَالَ سَأَلْتُ سَالِمَ بْنَ عَبْدِ اللَّهِ

عَنِ الرَّجُلِ يُضَاجِعُ امْرَأَتَهُ وَهِيَ حَائِضٌ فِي لِحَافٍ وَاحِدٍ فَقَالَ «أَمَّا نَحْنُ آلَ عُمَرَ فَنَهْجُرُهُنَّ إِذَا كُنَّ حُيَّضًا»