Sahih Bukhari Volume 9, Book 94, Hadith 7231

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 ‏"‏‏

Narrated By 'Aisha : Allah's Apostle said, "If I had formerly known hat I came to know lately, 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."