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." (ES)
English reference (ES): Vol. 1, Book 1, Hadith 287 (ES)
Arabic reference (ES): Book 1, Hadith 288 (ES)