It was narrated from 'Abdul-Malik bin Harith bin Hisham, from his father, that:
the Prophet married Umm Salamah in Shawwal, and consummated the marriage with her in Shawwal. (ID)
English reference (ID): Vol. 3, Book 9, Hadith 1991 (ID)
Arabic reference (ID): Book 9, Hadith 2068 (ID)