9:37
إِنَّمَا ٱلنَّسِىٓءُ زِيَادَةٌ فِى ٱلْكُفْرِ ۖ يُضَلُّ بِهِ ٱلَّذِينَ كَفَرُوا۟ يُحِلُّونَهُۥ عَامًا وَيُحَرِّمُونَهُۥ عَامًا لِّيُوَاطِـُٔوا۟ عِدَّةَ مَا حَرَّمَ ٱللَّهُ فَيُحِلُّوا۟ مَا حَرَّمَ ٱللَّهُ ۚ زُيِّنَ لَهُمْ سُوٓءُ أَعْمَـٰلِهِمْ ۗ وَٱللَّهُ لَا يَهْدِى ٱلْقَوْمَ ٱلْكَـٰفِرِينَ
9:37
Intercalating a month is adding to unbelief. The unbelievers are misguided by this, for they take the same month to be sacred one year and sacrilegious the next, thus making the number of months sanctified by God accord with theirs in order to make what God has forbidden, lawful. Attractive seem to them their evil deeds; but God does not show the unbelievers the way. - Ahmed Ali (English)