حَدَّثَنَا سُلَيْمَانُ بْنُ دَاوُدَ الْمَهْرِيُّ، أَخْبَرَنَا ابْنُ وَهْبٍ، عَنْ يُونُسَ بْنِ يَزِيدَ، عَنِ ابْنِ شِهَابٍ، أَنَّ عُمَرَ بْنَ الْخَطَّابِ، - رضى الله عنه - قَالَ وَهُوَ عَلَى الْمِنْبَرِ يَا أَيُّهَا النَّاسُ إِنَّ الرَّأْىَ إِنَّمَا كَانَ مِنْ رَسُولِ اللَّهِ صلى الله عليه وسلم مُصِيبًا لأَنَّ اللَّهَ كَانَ يُرِيهِ وَإِنَّمَا هُوَ مِنَّا الظَّنُّ وَالتَّكَلُّفُ ‏.‏

Narrated Umar ibn al-Khattab: Umar said while he was (sitting) on the pulpit: O people, the opinion from the Messenger of Allah (PBUH) was right, because Allah showed (i.e. inspired) him; but from us it is sheer conjecture and artifice. Translation Not Available

Book Ref: Sunan Abi Dawud Book 25 Hadith 3586
Web Ref:  Sunan Abi Dawud Book 24 Hadith 3579