(47) باب فِي إِتْيَانِ الْحَائِضِ وَمُبَاشَرَتِهَا
Maimunah daughter of Al Harith said "When the Apostle of Allaah(ﷺ) intended to associate and lie with any of his wives who was menstruating, he ordered her to wrap up the lower garment(loin-cloth) and then he had association with her.
Reference: Sunan Abi Dawud 2167
In-book reference: Book 12, Hadith 122
English translation: Book 11, Hadith 2162