It was narrated that 'Aishah said:
"If one of us was menstruating, the Messenger of Allah (ﷺ) would tell her to put on an Izar (waist wrap) then he would fondle her." (RU)
English reference (RU): Vol. 1, Book 1, Hadith 287 (RU)
Arabic reference (RU): Book 1, Hadith 288 (RU)