وَعَنْ أَبِي هُرَيْرَةَ
قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: («آيَةُ الْمُنَافِقِ ثَلَاثٌ». زَادَ مُسْلِمٌ: «وَإِنْ صَامَ وَصَلَّى وَزَعَمَ أَنَّهُ مُسْلِمٌ». ثُمَّ اتَّفَقَا: «إِذَا حَدَّثَ كَذَبَ وَإِذَا وَعَدَ أَخْلَفَ وَإِذَا اؤتمن خَان»
The Prophet (sallallahu alayhi wa sallam) said:, “There are three signs of a hypocrite.” Muslim added, “Even if he fasts, prays, and asserts that he is a Muslim.” Thereafter both Bukhari and Muslim said, “When he speaks he lies, when he makes a promise he breaks it, and when he is trusted he betrays his trust.”
Mishkat al-Masabih 50, Book 2, Faith, Hadith 49. 1 min read