إِنَّ عِدَّةَ ٱلشُّهُورِ عِندَ ٱللَّهِ ٱثۡنَا عَشَرَ شَهۡرٗا فِي كِتَٰبِ ٱللَّهِ يَوۡمَ خَلَقَ ٱلسَّمَٰوَٰتِ وَٱلۡأَرۡضَ مِنۡهَآ أَرۡبَعَةٌ حُرُمٞۚ ذَٰلِكَ ٱلدِّينُ ٱلۡقَيِّمُۚ فَلَا تَظۡلِمُواْ فِيهِنَّ أَنفُسَكُمۡۚ وَقَٰتِلُواْ ٱلۡمُشۡرِكِينَ كَآفَّةٗ كَمَا يُقَٰتِلُونَكُمۡ كَآفَّةٗۚ وَٱعۡلَمُوٓاْ أَنَّ ٱللَّهَ مَعَ ٱلۡمُتَّقِينَ
Surely, the number of months according to Allah is twelve (as written) in the Book of Allah on the day He created the heavens and the Earth, of which there are Four Sacred Months. That is the right faith. So, do not wrong yourself therein. And fight the Mushriks all together, as they fight you all together, and be sure that Allah is with the God-fearing.
إِنَّمَا ٱلنَّسِيٓءُ زِيَادَةٞ فِي ٱلۡكُفۡرِۖ يُضَلُّ بِهِ ٱلَّذِينَ كَفَرُواْ يُحِلُّونَهُۥ عَامٗا وَيُحَرِّمُونَهُۥ عَامٗا لِّيُوَاطِـُٔواْ عِدَّةَ مَا حَرَّمَ ٱللَّهُ فَيُحِلُّواْ مَا حَرَّمَ ٱللَّهُۚ زُيِّنَ لَهُمۡ سُوٓءُ أَعۡمَٰلِهِمۡۗ وَٱللَّهُ لَا يَهۡدِي ٱلۡقَوۡمَ ٱلۡكَٰفِرِينَ
Nasī’ (i.e. postponement of months) is nothing but a further excess in infidelity, whereby the disbelievers are misguided. They allow it one year and disallow it another year, so that they may conform (only) to the number of what Allah has sanctified, and allow what Allah has disallowed. The evil of their deeds has been beautified for them (by Satan). And Allah does not lead the disbelieving people to the right path.