The Messenger of Allah (may Allah's peace and blessings be upon him) used to recline in my lap and recite the Qur'an during my menstruation
Authentic hadithعن عَائِشَة رضي الله عنها قالت: «كان رسول الله صلى الله عليه وسلم يَتَكِّئُ فِي حِجرِي، فَيَقرَأُ القرآن وأنا حَائِض».
‘Ā'ishah (may Allah be pleased with her) reported: The Messenger of Allah (may Allah's peace and blessings be upon him) used to recline in my lap and recite the Qur'an during my menstruation.
Explanation
‘Ā'ishah (may Allah be pleased with her) mentioned that the Prophet (may Allah's peace and blessings be upon him) used to recline in her lap and recite the Qur'an while she was having her menses. This indicates that the body of the menstruating woman is pure, and does not become impure because of menstruation.
Source · Narrated by Bukhari & Muslim
From the Hadith Encyclopedia (hadeethenc.com).