"When the 'Iddah of Zainab was over, the Messenger of Allah said to Zaid: 'Propose marriage to her on my behalf.' Zaid went and said: 'O Zainab, rejoice, for the Messenger of Allah has sent me to you to propose marriage on his behalf.' She said: 'I will not do anything until I consult my Lord.' She went to her prayer place and Qur'an was revealed, then the Messenger of Allah came and entered upon her without any formalities."  

قَالَ رَسُولُ اللَّهِ ﷺ لِزَيْدٍ اذْكُرْهَا عَلَىَّ قَالَ زَيْدٌ فَانْطَلَقْتُ فَقُلْتُ يَا زَيْنَبُ أَبْشِرِي أَرْسَلَنِي إِلَيْكِ رَسُولُ اللَّهِ ﷺ يَذْكُرُكِ فَقَالَتْ مَا أَنَا بِصَانِعَةٍ شَيْئًا حَتَّى أَسْتَأْمِرَ رَبِّي فَقَامَتْ إِلَى مَسْجِدِهَا وَنَزَلَ الْقُرْآنُ وَجَاءَ رَسُولُ اللَّهِ ﷺ فَدَخَلَ بِغَيْرِ أَمْرٍ  

Zainab bint Jahsh used to boast to the other wives of the Prophet and say: "Allah married me to him from above the Heavens." And the Verse of Hijab was revealed concerning her.  

سَمِعْتُ أَنَسَ بْنَ مَالِكٍ يَقُولُ كَانَتْ زَيْنَبُ بِنْتُ جَحْشٍ تَفْخَرُ عَلَى نِسَاءِ النَّبِيِّ ﷺ تَقُولُ إِنَّ اللَّهَ ﷻ أَنْكَحَنِي مِنَ السَّمَاءِ وَفِيهَا نَزَلَتْ آيَةُ الْحِجَابِ