I am the most knowledgeable of people regarding the verse of the veil, for Ubayy bin Kaab used to ask me about it.Anas said, The Messenger of Allah ﷺ became a bridegroom upon marrying Zaynab bint Jahsh. He had married her in Medina, and he invited the people to a meal after the day had risen high. The Messenger of Allah sat down, and some men sat with him after the rest of the people had stood up to leave. Eventually the Messenger of Allah stood up and walked, and I walked with him until he reached the door of Ayesha's room. Then he thought they had left, so he returned, and I returned with him, but there they were, still sitting in their places.So he turned back again, and I turned back with him a second time until he reached Ayesha's room. Then he turned back once more, and I turned back with him, and this time they had finally stood up. He then drew the curtain between himself and me, and Allah revealed the verse of the veil.
و حدثني عمرو الناقد حدثنا يعقوب بن إبراهيم بن سعد حدثنا أبي عن صالح قال ابن شهاب إن
أنا أعلم الناس بالحجاب لقد كان أبي بن كعب يسألني عنه قال أنس أصبح رسول الله ﷺ عروسا بزينب بنت جحش قال وكان تزوجها بالمدينة فدعا الناس للطعام بعد ارتفاع النهار فجلس رسول الله وجلس معه رجال بعد ما قام القوم حتى قام رسول الله فمشى فمشيت معه حتى بلغ باب حجرة عائشة ثم ظن أنهم قد خرجوا فرجع ورجعت معه فإذا هم جلوس مكانهم فرجع فرجعت الثانية حتى بلغ حجرة عائشة فرجع فرجعت فإذا هم قد قاموا فضرب بيني وبينه بالستر وأنزل الله آية الحجاب