[Machine] Muhammad ibn Muslim narrated to me that the Messenger of Allah ﷺ stayed in Makkah for fifteen nights, shortening the prayers, until he reached Hunayn. This is the authentic report and it was also narrated by Abdah ibn Sulaiman, Ahmad ibn Khalil al-Wahbi, Salamah ibn Al-Fadl from Ibn Ishaq, and they did not mention anything about Ibn Abbas in it.  

وَحَدَّثَنِي مُحَمَّدُ بْنُ مُسْلِمٍ ثُمَّ أَقَامَ رَسُولُ اللهِ ﷺ بِمَكَّةَ خَمْسَ عَشْرَةَ لَيْلَةً يَقْصُرُ الصَّلَاةَ حَتَّى سَارَ إِلَى حُنَيْنٍ هَذَا هُوَ الصَّحِيحُ مُرْسَلٌ وَرَوَاهُ أَيْضًا عَبْدَةُ بْنُ سُلَيْمَانَ وَأَحْمَدُ بْنُ خَالٍ الْوَهْبِيُّ وَسَلَمَةُ بْنُ الْفَضْلِ عَنِ ابْنِ إِسْحَاقَ وَلَمْ يَذْكُرُوا فِيهِ ابْنَ عَبَّاسٍ