Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
quran:2:204

And of the people is he whose speech pleases you in worldly life, and he calls Allah to witness as to what is in his heart, yet he is the fiercest of opponents.  

And among people there is he whose speech in the life of this world pleases you, but it would not please you in the Hereafter because it contradicts what he actually used to believe; and who calls on God to witness what is in his heart, as being in accordance with what he says; yet he is most stubborn in dispute, with you and your followers on account of his enmity towards you: this was al-Akhnas b. Sharīq, a hypocrite who spoke kindly in the presence of the Prophet (s), swearing that he believed in him and that he loved him, and frequently sitting with him. God then revealed his mendacity in this matter. On one occasion he passed by some crops and livestock that belonged to the Muslims and later that night he set fire to them ˹the crops˺ and slaughtered them ˹the livestock˺. God, moreover, says:
القرآن:٢:٢٠٤

وَمِنَ النَّاسِ مَنْ يُعْجِبُكَ قَوْلُهُ فِي الْحَيَاةِ الدُّنْيَا وَيُشْهِدُ اللَّهَ عَلَىٰ مَا فِي قَلْبِهِ وَهُوَ أَلَدُّ الْخِصَامِ  

{ومن الناس من يعجبك قوله في الحياة الدنيا} ولا يعجبك في الآخرة مخالفته لاعتقاده {ويُشهد الله على ما في قلبه} أنه موافق لقوله {وهو ألدُّ الخصام} شديد الخصومة لك ولأتباعك لعداوته لك وهو الأخنس بن شريق كان منافقاً حلو الكلام للنبي ﷺ يحلف أنه مؤمن به ومحب له فيدنى مجلسه فأكذبه الله في ذلك ومر بزرع وَحُمُر لبعض المسلمين فأحرقه وعقرها ليلا كما قال تعالى.