I said to 'Urwa: How long did Allah's Apostle ﷺ stay in Mecca? He said: For ten years. I said: Ibn Abbas says it is some years above ten. He ('Urwa) sought forgiveness for him and said: His statement is based on the verse of a poet.
قُلْتُ لِعُرْوَةَ كَمْ لَبِثَ النَّبِيُّ ﷺ بِمَكَّةَ قَالَ عَشْرًا قُلْتُ فَإِنَّ ابْنَ عَبَّاسٍ يَقُولُ بِضْعَ عَشْرَةَ قَالَ فَغَفَّرَهُ وَقَالَ إِنَّمَا أَخَذَهُ مِنْ قَوْلِ الشَّاعِرِ