Musannaf Ibn Abi Shayba 1:2029

2029. Abu Bakr narrated to us, he said: Mu'adh narrated to us, from Ash'ath, from al-Hasan and Ibn Sirin, that they both said: "There is no harm in the person in a state of major ritual impurity (junub) and the menstruating woman sprinkling the mosque."