Sahih Muslim , Book 1, Hadith 114 (USC-MSA) ⓘ

'Uqba b. Mukarram al-'Ami reported that he heard 'Ala' b. 'Abdur-Rahman narrating this hadith with this chain of transmitters and he said: Three are the signs of a hypocrite, even if he observed fast and prayed and asserted that he was a Muslim.

حَدَّثَنَا عُقْبَةُ بْنُ مُكْرَمٍ الْعَمِّيُّ، حَدَّثَنَا يَحْيَى بْنُ مُحَمَّدِ بْنِ قَيْسٍ أَبُو زُكَيْرٍ، قَالَ سَمِعْتُ الْعَلاَءَ بْنَ عَبْدِ الرَّحْمَنِ، يُحَدِّثُ بِهَذَا الإِسْنَادِ وَقَالَ ‏ "‏ آيَةُ الْمُنَافِقِ ثَلاَثٌ وَإِنْ صَامَ وَصَلَّى وَزَعَمَ أَنَّهُ مُسْلِمٌ ‏" ‏ ‏.‏