(108) باب فِي الرَّجُلِ يُصِيبُ مِنْهَا مَا دُونَ الْجِمَاعِ
Narrated One of the Wives of the Prophet:
Ikrimah reported on the authority of one of the wives of the Prophet (ﷺ) saying: When the Prophet (ﷺ) wanted to do something (i.e. kissing, embracing) with (his) menstruating wife, he would put a garment on her private part.
Reference: Sunan Abi Dawud 272
In-book reference: Book 1, Hadith 272
English translation: Book 1, Hadith 272