حَدَّثَنَا مُحَمَّدُ بْنُ يَحْيَى بْنِ فَارِسٍ، أَخْبَرَنَا مُحَمَّدُ بْنُ كَثِيرٍ، أَخْبَرَنَا سُلَيْمَانُ بْنُ كَثِيرٍ، عَنِ الزُّهْرِيِّ، عَنْ عُبَيْدِ اللَّهِ، عَنِ ابْنِ عَبَّاسٍ، عَنِ النَّبِيِّ صلى الله عليه وسلم بِهَذَا الْحَدِيثِ لَمْ يَذْكُرِ الْقَسَمَ، زَادَ فِيهِ وَلَمْ يُخْبِرْهُ
Translation
The tradition mentioned above has also been transmitted by Ibn 'Abbas through a different chain of narrators. In this version there is no mention of the word qasam (oath). It has the words

With this hadith, but he did not mention the oath, and he added in it: "And he did not inform him."