Hudhaifa reported: The Messenger of Allah, peace and blessings be upon him, said, “Verily, I fear for you that a man will recite the Quran until his delight is seen and he takes Islam as a cloak. Then, he changes to whatever Allah wills for him, such that it is stripped from him and he throws it behind his back, assaulting his neighbor with the sword and accusing him of idolatry.” I said, “O Prophet of Allah, which one is closer to idolatry? The accused or the accuser?” The Prophet said, “Rather it is the accuser.”

Source: Sahih Ibn Hibban 81

Grade: Sahih (authentic) according to Ibn Kathir

عن حذيفة قَالَ قَالَ رَسُولُ اللَّهِ صَلَّى الِلَّهِ عَلَيْهِ وَسَلَّمَ إِنَّ مَا أَتَخَوَّفُ عَلَيْكُمْ رَجُلٌ قَرَأَ الْقُرْآنَ حَتَّى رُئِيَتْ بَهْجَتُهُ عَلَيْهِ وَكَانَ رِدْئًا لِلإِسْلامِ غَيَّرَهُ إِلَى مَا شَاءَ الِلَّهِ فَانْسَلَخَ مِنْهُ وَنَبَذَهُ وَرَاءَ ظَهْرِهِ وَسَعَى عَلَى جَارِهِ بِالسَّيْفِ وَرَمَاهُ بِالشِّرْكِ قَالَ قُلْتُ يَا نَبِيَّ اللَّهِ أَيُّهُمَا أَوْلَى بِالشِّرْكِ الْمَرْمِيُّ أَمِ الرَّامِي قَالَ بَلِ الرَّامِي

81 صحيح ابن حبان كتاب العلم باب الزجر عن كتبة المرء السنن

المحدث ابن كثير خلاصة حكم المحدث إسناده جيد