1233Abu DawoodDa'if Munkar, and the Sahih version is 19 days as in a previous hadith. (Al-Albani)حَدَّثَنَا نَصْرُ بْنُ عَلِيٍّ، أَخْبَرَنِي أَبِي، حَدَّثَنَا شَرِيكٌ، عَنِ ابْنِ الأَصْبَهَانِيِّ، عَنْ عِكْرِمَةَ، عَنِ ابْنِ عَبَّاسٍ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم أَقَامَ بِمَكَّةَ سَبْعَ عَشْرَةَ يُصَلِّي رَكْعَتَيْنِ .Narrated Ibn 'Abbas:The Messenger of Allah (ﷺ) stayed in Mecca seventeen days and prayed two rak'ahs (at each time of prayer).Reference: Sunan Abi Dawud 1232 In-book : Book 4, Hadith 35 English translation : Book 4, Hadith 1228