I of all the people know best this verse of Al-Hijab. When Messenger of Allah ﷺ married Zainab bint Jahsh she was with him in the house and he prepared a meal and invited the people (to it). They sat down (after finishing their meal) and started chatting. So the Prophet ﷺ went out and then returned several times while they were still sitting and talking. So Allah revealed the Verse: 'O you who believe! Enter not the Prophet's houses until leave is given to you for a meal, (and then) not (so early as) to wait for its preparation .....ask them from behind a screen.' (33.53) So the screen was set up and the people went away.  

أَنَسُ بْنُ مَالِكٍ أَنَا أَعْلَمُ النَّاسِ بِهَذِهِ الآيَةِ آيَةِ الْحِجَابِ لَمَّا أُهْدِيَتْ زَيْنَبُ إِلَى رَسُولِ اللَّهِ ﷺ كَانَتْ مَعَهُ فِي الْبَيْتِ صَنَعَ طَعَامًا وَدَعَا الْقَوْمَ فَقَعَدُوا يَتَحَدَّثُونَ فَجَعَلَ النَّبِيُّ ﷺ يَخْرُجُ ثُمَّ يَرْجِعُ وَهُمْ قُعُودٌ يَتَحَدَّثُونَ فَأَنْزَلَ اللَّهُ تَعَالَى {يَا أَيُّهَا الَّذِينَ آمَنُوا لاَ تَدْخُلُوا بُيُوتَ النَّبِيِّ إِلاَّ أَنْ يُؤْذَنَ لَكُمْ إِلَى طَعَامٍ غَيْرَ نَاظِرِينَ إِنَاهُ} إِلَى قَوْلِهِ {مِنْ وَرَاءِ حِجَابٍ} فَضُرِبَ الْحِجَابُ وَقَامَ الْقَوْمُ  

[Machine] When the Prophet ﷺ married Zaynab, Umm Sulaym gave him a dish of barley in a bowl made of stones. Anas said, "The Prophet ﷺ said, 'Go and invite anyone you meet.' So, I invited whoever I met, and they started entering and eating until they were satisfied." The Prophet ﷺ then placed his hand on the food, made a supplication, and said, "Whatever Allah wishes to say." Anas continued, "I did not leave anyone whom I met without inviting them, and they all ate until they were full and left." Then, a group of them remained and continued to talk to the Prophet ﷺ, causing him to feel shy to ask them to leave. He eventually left them in the house. Later, Allah revealed the verse: "O you who have believed, do not enter the houses of the Prophet except when you are permitted for a meal, without awaiting its readiness. But when you are invited, then enter" (Quran 33:53) until the part: "for your hearts and their hearts" (Quran 33:53).  

لَمَّا تَزَوَّجَ النَّبِيُّ ﷺ زَيْنَبَ أَهْدَتْ إِلَيْهِ أُمُّسُلَيْمٍ حَيْسًا فِي تَوْرٍ مِنْ حِجَارَةٍ قَالَ أَنَسٌ فَقَالَ النَّبِيُّ ﷺ فَاذْهَبْ فَادْعُ مَنْ لَقِيتَ فَدَعَوْتُ لَهُ مَنْ لَقِيتُ فَجَعَلُوا يَدْخُلُونَ يَأْكُلُونَ وَيَخْرُجُونَ وَوَضَعَ النَّبِيُّ ﷺ يَدَهُ عَلَى الطَّعَامِ فدَعَا فِيهِ وَقَالَ مَا شَاءَ اللهُ أَنْ يَقُولَ وَلَمْ أَدَعْ أَحَدًا لَقِيتُهُ إِلَّا دَعَوْتُهُ فَأَكَلُوا حَتَّى شَبِعُوا وَخَرَجُوا فَبَقِيَتْ طَائِفَةٌ مِنْهُمْ فَأَطَالُوا عَلَيْهِ الْحَدِيثَ فَجَعَلَ النَّبِيُّ ﷺ يَسْتَحيِي مِنْهُمْ أَنْ يَقُولَ لَهُمْ شَيْئًا فَخَرَجَ وَتَرَكَهُمْ فِي الْبَيْتِ فَأَنْزَلَ اللهُ ﷻ {يَا أَيُّهَا الَّذِينَ آمَنُوا لَا تَدْخُلُوا بُيُوتَ النَّبِيِّ إِلَّا أَنْ يُؤْذَنَ لَكُمْ إِلَى طَعَامٍ غَيْرَ نَاظِرِينَ إِنَاهُ وَلَكِنْ إِذَا دُعِيتُمْ فَادْخُلُوا} [الأحزاب 53] حَتَّى بَلَغَ {لِقُلُوبِكُمْ وَقُلُوبِهِنَّ} [الأحزاب 53]  

[Machine] I know people by this verse, when Zainab was given to the Messenger of Allah ﷺ and she was with him in the house and made food, then the people came, so the Messenger of Allah ﷺ went out and the people stayed in their places, and he returned while the people were sitting. So Allah revealed, "O you who have believed, do not enter the houses of the Prophet except when you are permitted for a meal, without awaiting its readiness. But when you are invited, then enter; and when you have eaten, disperse without seeking to remain for conversation. Indeed, that [behavior] was troubling the Prophet, and he is shy of [dismissing] you. But Allah is not shy of the truth. And when you ask [his wives] for something, ask them from behind a partition." So the Messenger of Allah ﷺ struck the curtain and the people stood up.  

أَنَا أَعْلَمُ النَّاسِ بِهَذِهِ الْآيَةِ لَمَّا أُهْدِيَتْ زَيْنَبُ إِلَى رَسُولِ اللهِ ﷺ كَانَتْ مَعَهُ فِي الْبَيْتِ فَصَنَعَ طَعَامًا فَجَاءَ الْقَوْمُ فَجَعَلَ رَسُولُ اللهِ ﷺ يَخْرُجُ وَالْقَوْمُ مَكَانَهُمْ وَيَرْجِعُ وَالْقَوْمُ قُعُودٌ فَأَنْزَلَ اللهُ {يَا أَيُّهَا الَّذِينَ آمَنُوا لَا تَدْخُلُوا بُيُوتَ النَّبِيِّ إِلَّا أَنْ يُؤْذَنَ لَكُمْ إِلَى طَعَامٍ غَيْرَ نَاظِرِينَ إِنَاهُ وَلَكِنْ إِذَا دُعِيتُمْ فَادْخُلُوا فَإِذَا طَعِمْتُمْ فَانْتَشِرُوا وَلَا مُسْتَأْنِسِينَ لِحَدِيثٍ إِنَّ ذَلِكُمْ كَانَ يُؤْذِي النَّبِيَّ فَيَسْتَحِيِي مِنْكُمْ وَاللهُ لَا يَسْتَحِيِي مِنَ الْحَقِّ وَإِذَا سَأَلْتُمُوهُنَّ مَتَاعًا فَاسْأَلُوهُنَّ مِنْ وَرَاءِ حِجَابٍ} فَضَرَبَ رَسُولُ اللهِ ﷺ الْحِجَابَ وَقَامَ الْقَوْمُ