Not graded
Sunan ad-Darimi 1094
أَخْبَرَنَا يَعْلَى بْنُ عُبَيْدٍ حَدَّثَنَا عَبْدُ الْمَلِكِ عَنْ عَطَاءٍ فِي رَجُلٍ جَامَعَ امْرَأَتَهُ وَهِيَ حَائِضٌ قَالَ يَتَصَدَّقُ بِدِينَارٍ
This hadith has no English translation yet: the Arabic text, the reference and the grade are shown here.
Reported by Ad-Darimi (No. 1094).