Musnad Ahmad 1156:70

Abu Kamil narrated to us, he said: Ibrahim bin Sa'd narrated to us, he said: Ibn Shihab narrated to us, from Hind bint al-Harith, from Umm Salamah, she said: "When the Messenger of Allah, peace and blessings of Allah be upon him, would say the taslim, the women would stand up when he finished his taslim, and he would remain in his place for a little while before he stood up."