It was narrated that Ibn 'Umar said:
"The Messenger of Allah said: 'No one who is sexually impure and no woman who is menstruating should recite Qur'an.'" (JA)
English reference (JA): Vol. 1, Book 1, Hadith 595 (JA)
Arabic reference (JA): Book 1, Hadith 638 (JA)