2:76
وَإِذَالَقُوا۟ٱلَّذِينَءَامَنُوا۟قَالُوٓا۟ءَامَنَّاوَإِذَاخَلَابَعْضُهُمْإِلَىٰبَعْضٍقَالُوٓا۟أَتُحَدِّثُونَهُمبِمَافَتَحَٱللَّهُعَلَيْكُمْلِيُحَآجُّوكُمبِهِۦعِندَرَبِّكُمْ ۚأَفَلَاتَعْقِلُونَ٧٦
wa-idhā laqū alladhīna āmanū qālū āmannā wa-idhā khalā baʿḍuhum ilā baʿḍin qālū atuḥaddithūnahum bimā fataḥa l-lahu ʿalaykum liyuḥājjūkum bihi ʿinda rabbikum afalā taʿqilūna
And when they meet those who believe, they say, "We have believed"; but when they are alone with one another, they say, "Do you talk to them about what Allāh has revealed to you so they can argue with you about it before your Lord?" Then will you not reason?(76)