Sunan Abi Dawud, Book 1, Hadith 212 (USC-MSA) ⓘ

Narrated Abdullah ibn Sa'd al-Ansari: Abdullah asked the Messenger of Allah: What is lawful for me to do with my wife when she is menstruating? He replied: What is above the waist-wrapper is lawful for you. The narrator also mentioned (the lawfulness of) eating with a woman in menstruation, and he transmitted the tradition in full.

حَدَّثَنَا هَارُونُ بْنُ مُحَمَّدِ بْنِ بَكَّارٍ، حَدَّثَنَا مَرْوَانُ، - يَعْنِي ابْنَ مُحَمَّدٍ - حَدَّثَنَا الْهَيْثَمُ بْنُ حُمَيْدٍ، حَدَّثَنَا الْعَلاَءُ بْنُ الْحَارِثِ، عَنْ حَرَامِ بْنِ حَكِيمٍ، عَنْ عَمِّهِ، أَنَّهُ سَأَلَ رَسُولَ اللَّهِ صلى الله عليه وسلم مَا يَحِلُّ لِي مِنَ امْرَأَتِي وَهِيَ حَائِضٌ قَالَ ‏ "‏ لَكَ مَا فَوْقَ الإِزَارِ ‏" ‏ ‏.‏ وَذَكَرَ مُؤَاكَلَةَ الْحَائِضِ أَيْضًا وَسَاقَ الْحَدِيثَ ‏.‏