[Machine] Zaid bin Harithah came to complain to the Messenger of Allah ﷺ about Zainab bint Jahsh. The Prophet ﷺ said, "Hold on to your family." Then the verse "And you conceal within yourself what Allah is to disclose" [Quran 33:37] was revealed as stated in Sahih al-Bukhari and Muslim.
جَاءَ زَيْدُ بْنُ حَارِثَةَ يَشْكُو إِلَى رَسُولِ اللَّهِ ﷺ مِنْ زَيْنَبَ بِنْتِ جَحْشٍ فَقَالَ النَّبِيُّ ﷺ «أَمْسِكْ عَلَيْكَ أَهْلَكَ» فَنَزَلَتْ {وَتُخْفِي فِي نَفْسِكَ مَا اللَّهُ مُبْدِيهِ} [الأحزاب 37] على شرط البخاري ومسلم