From the Hadith of Yahya ibn Muhammad. "And He will surely give them in exchange, after their fear, security, [they will] worship Me, not associating anything with Me. But whoever disbelieves after that, then those are the defiantly disobedient." [He says: Whoever persists in his disbelief after this which I have revealed], meaning: the disobedience of polytheism.
مِنْ حَدِيثِ يحيى بْنِ مُحَمَّدٍ. ﴿وَلَيُبَدِّلَنَّهُمْ مِنْ بَعْدِ خَوْفِهِمْ أَمْنًا يَعْبُدُونَنِي لَا يُشْرِكُونَ بِي شَيْئًا وَمَنْ كَفَرَ بَعْدَ ذَلِكَ فَأُولَئِكَ هم الْفَاسِقُونَ﴾ [يَقُولُ: مَنْ أَقَامَ عَلَى كُفْرِهِ بَعْدَ هَذَا الَّذِي أَنْزَلْتُ] يَعْنِي: فسق الشّرك (ل ٢٣٦)