Surah Al-Anfal Verse 13 - English Translation by A. J. Arberry
Surah Al-Anfalذَٰلِكَ بِأَنَّهُمۡ شَآقُّواْ ٱللَّهَ وَرَسُولَهُۥۚ وَمَن يُشَاقِقِ ٱللَّهَ وَرَسُولَهُۥ فَإِنَّ ٱللَّهَ شَدِيدُ ٱلۡعِقَابِ
That, because they had made a breach with God and with His Messenger; and whosoever makes a breach with God and with His Messenger, surely God is terrible in retribution