Sahih Muslim Book 31, Hadith Number 5900.
Chapter : The excellent qualities of ‘Umar (Allah be pleased with him).
Abu Huraira reported that Umar b. Khattab came to Allah’s Messenger (may peace be upon him) while there were some women with him and they were raising their voices above the voice of Allah’s Messenger (may peace be upon him) and when Umar sought permission to get into the house they went behind the curtain hurriedly. The rest of the hadith is the same.