Sahih al-Bukhari 7229
Narrated `Aisha:
Allah's Messenger (ﷺ) said, "If I had formerly known what I came to know recently, I would not have driven the 
Hadi with me and would have finished the state of Ihram along with the people when they finished it."
حَدَّثَنَا يَحْيَى بْنُ بُكَيْرٍ، حَدَّثَنَا اللَّيْثُ، عَنْ عُقَيْلٍ، عَنِ ابْنِ شِهَابٍ، حَدَّثَنِي عُرْوَةُ، أَنَّ عَائِشَةَ، قَالَتْ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏
"‏ لَوِ اسْتَقْبَلْتُ مِنْ أَمْرِي مَا اسْتَدْبَرْتُ مَا سُقْتُ الْهَدْىَ، وَلَحَلَلْتُ مَعَ النَّاسِ حِينَ حَلُّوا ‏"‏‏.‏