وَيَقُولُونَ طَاعَةٌ فَإِذَا بَرَزُوا مِنْ عِندِكَ بَيَّتَ طَائِفَةٌ مِّنْهُمْ غَيْرَ الَّذِي تَقُولُ وَاللَّهُ يَكْتُبُ مَا يُبَيِّتُونَ فَأَعْرِضْ عَنْهُمْ وَتَوَكَّلْ عَلَى اللَّهِ وَكَفَى بِاللَّهِ وَكِيلًا
They profess obedience [to you], but when they go out from your presence, a group of them conspire overnight [to do] something other than what you say. But Allah records what they conspire overnight. So disregard them and put your trust in Allah, for Allah suffices as trustee.
Agha Ali Puya Commentary
Commentary on Quran 4:81
[Pooya/Ali Commentary 4:81] This refers to the hypocrites who professed obedience to the Holy Prophet in front of him, but when alone, conspired against him.