At-Tawbah · Ayah 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 أَعْمَٰلِهِمْ وَٱللَّهُ لَا يَهْدِى ٱلْقَوْمَ ٱلْكَٰفِرِينَ
Indeed, the postponing [of restriction within sacred months] is an increase in disbelief by which those who have disbelieved are led [further] astray. They make it[473] lawful one year and unlawful another year to correspond to the number made unlawful by Allāh[474] and [thus] make lawful what Allāh has made unlawful. Made pleasing to them is the evil of their deeds; and Allāh does not guide the disbelieving people.
Translator's notes
[473] Fighting during a sacred month. [474] If they found it advantageous to violate a sacred month, they would do so, designating another month in its place in which to observe the restrictions concerning fighting.
Quran 9:37 (At-Tawbah) · Saheeh International, Noor International Center (QuranEnc v1.1.2)