Surah Al-Mujadila 58:12

يَـٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُوٓا۟ إِذَا نَـٰجَيْتُمُ ٱلرَّسُولَ فَقَدِّمُوا۟ بَيْنَ يَدَىْ نَجْوَىٰكُمْ صَدَقَةً ۚ ذَٰلِكَ خَيْرٌ لَّكُمْ وَأَطْهَرُ ۚ فَإِن لَّمْ تَجِدُوا۟ فَإِنَّ ٱللَّهَ غَفُورٌ رَّحِيمٌ

O you who have believed, when you [wish to] privately consult the Messenger, present before your consultation a charity. That is better for you and purer. But if you find not [the means] - then indeed, Allāh is Forgiving and Merciful.

Translation: Saheeh International

Tafsir

O you who believe when you converse in secret with the Messenger when you wish to converse with him privately offer some voluntary alms before your secret talk. That is better for you and purer for your sins. …

Excerpt from Tafsir al-Jalalayn, commentary on 58:12, via Quran.com. The reader has the full commentary and 9 more tafsirs.