Ikrimah (may Allah have mercy on him) narrates from one of the wives of the Prophet (peace and blessings be upon him) (may Allah be pleased with her) that when the Prophet (peace and blessings be upon him) wanted something from a menstruating woman, he (peace and blessings be upon him) would instruct her to put a cloth over her private part, then he (peace and blessings be upon him) would do what he wished. Abu Bakr (may Allah have mercy on him) said: "All the wives of the Prophet (peace and blessings be upon him) are thiqat (trustworthy)."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحيض / 1506