Surah An-Nisa 4:81

وَيَقُولُونَ طَاعَةٌ فَإِذَا بَرَزُوا۟ مِنْ عِندِكَ بَيَّتَ طَآئِفَةٌ مِّنْهُمْ غَيْرَ ٱلَّذِى تَقُولُ ۖ وَٱللَّهُ يَكْتُبُ مَا يُبَيِّتُونَ ۖ فَأَعْرِضْ عَنْهُمْ وَتَوَكَّلْ عَلَى ٱللَّهِ ۚ وَكَفَىٰ بِٱللَّهِ وَكِيلًا

And they say, "[We pledge] obedience." But when they leave you, a group of them spend the night determining to do other than what you say. But Allāh records what they plan by night. So leave them alone and rely upon Allāh. And sufficient is Allāh as Disposer of affairs.

Translation: Saheeh International

Tafsir

They say that is the hypocrites say when they come to you ‘Our affair is all about Obedience to you’; but when they sally forth when they depart from you a party of them harbour the final tā’ of the feminine-ending in bayyatat ‘harbour’ can either be elided with the following tā’ of tā’ifa ‘a party’ or simply omitted …

Excerpt from Tafsir al-Jalalayn, commentary on 4:81, via Quran.com. The reader has the full commentary and 9 more tafsirs.