Musnad Ahmad Hadith 13769

It is narrated from Anas (may Allah be pleased with him) that on the first night the Prophet (ﷺ) stayed with Zainab bint Jahsh (may Allah be pleased with her), the next morning the Prophet (ﷺ) gave a wedding feast (walima) and fed the Muslims plenty of bread and meat. Then, as usual, he returned and went to the houses of the pure wives and greeted them, and they prayed for the Prophet (ﷺ). Then he returned again, and when he reached home, he saw that two men were sitting in a corner of the house talking to each other. The Prophet (ﷺ), seeing them, turned back. When those two saw the Prophet (ﷺ) turning back from his house, they quickly stood up. Now I do not remember whether I informed the Prophet (ﷺ) of their departure or someone else did. In any case, the Prophet (ﷺ) returned home and hung a curtain between me and himself, and the verse of hijab was revealed.