Surah Al-Ahzab 33:37

وَإِذْ تَقُولُ لِلَّذِىٓ أَنْعَمَ ٱللَّهُ عَلَيْهِ وَأَنْعَمْتَ عَلَيْهِ أَمْسِكْ عَلَيْكَ زَوْجَكَ وَٱتَّقِ ٱللَّهَ وَتُخْفِى فِى نَفْسِكَ مَا ٱللَّهُ مُبْدِيهِ وَتَخْشَى ٱلنَّاسَ وَٱللَّهُ أَحَقُّ أَن تَخْشَىٰهُ ۖ فَلَمَّا قَضَىٰ زَيْدٌ مِّنْهَا وَطَرًا زَوَّجْنَـٰكَهَا لِكَىْ لَا يَكُونَ عَلَى ٱلْمُؤْمِنِينَ حَرَجٌ فِىٓ أَزْوَٰجِ أَدْعِيَآئِهِمْ إِذَا قَضَوْا۟ مِنْهُنَّ وَطَرًا ۚ وَكَانَ أَمْرُ ٱللَّهِ مَفْعُولًا

And [remember, O Muḥammad], when you said to the one on whom Allāh bestowed favor and you bestowed favor, "Keep your wife and fear Allāh," while you concealed within yourself that which Allāh is to disclose. And you feared the people, while Allāh has more right that you fear Him. So when Zayd had no longer any need for her, We married her to you in order that there not be upon the believers any discomfort [i.e., guilt] concerning the wives of their claimed [i.e., adopted] sons when they no longer have need of them. And ever is the command [i.e., decree] of Allāh accomplished.

Translation: Saheeh International

Tafsir

And when idh is dependent because of an implied preceding udhkur ‘mention when’ you said to him to whom God had shown favour by guiding him to Islam and to whom you too had shown favour by manumitting him — this was Zayd b. …

Excerpt from Tafsir al-Jalalayn, commentary on 33:37, via Quran.com. The reader has the full commentary and 9 more tafsirs.