أَخْبَرَنَا أَبُو نُعَيْمٍ ، حَدَّثَنَا شَرِيكٌ ، عَنْ سِمَاكٍ ، عَنْ عِكْرِمَةَ ، عَنِ ابْنِ عَبَّاسٍ قِيلَ لِشَرِيكٍ عَنِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ؟.
قَالَ : نَعَمْ" لا حِلْفَ فِي الْإِسْلَامِ، وَالْحِلْفُ فِي الْجَاهِلِيَّةِ لَمْ يَزِدْهُ الْإِسْلَامُ إِلَّا شِدَّةً وَحِدَّةً "

Abu Nu`aym told us, Sharik told us, on the authority of Simak, on the authority of Ikrimah, on the authority of Ibn Abbas, it was said to Sharik on the authority of the Prophet, may God bless him and grant him peace?
He said: Yes, there is no swearing in Islam, and swearing in pre-Islamic times Islam only increased its severity and severity.