Language:
كتاب المناقب
61
Virtues and Merits of the Prophet (pbuh) and his Companions
(18)
Chapter: The last of all the Prophets (Muhammad (saws))
(18)
باب خَاتِمِ النَّبِيِّينَ صلى الله عليه وسلم

Narrated Abu Huraira:

Allah's Messenger (ﷺ) said, "My similitude in comparison with the other prophets before me, is that of a man who has built a house nicely and beautifully, except for a place of one brick in a corner. The people go about it and wonder at its beauty, but say: 'Would that this brick be put in its place!' So I am that brick, and I am the last of the Prophets."

حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، حَدَّثَنَا إِسْمَاعِيلُ بْنُ جَعْفَرٍ، عَنْ عَبْدِ اللَّهِ بْنِ دِينَارٍ، عَنْ أَبِي صَالِحٍ، عَنْ أَبِي هُرَيْرَةَ ـ رضى الله عنه ـ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ ‏ "‏ إِنَّ مَثَلِي وَمَثَلَ الأَنْبِيَاءِ مِنْ قَبْلِي كَمَثَلِ رَجُلٍ بَنَى بَيْتًا فَأَحْسَنَهُ وَأَجْمَلَهُ، إِلاَّ مَوْضِعَ لَبِنَةٍ مِنْ زَاوِيَةٍ، فَجَعَلَ النَّاسُ يَطُوفُونَ بِهِ وَيَعْجَبُونَ لَهُ، وَيَقُولُونَ هَلاَّ وُضِعَتْ هَذِهِ اللَّبِنَةُ قَالَ فَأَنَا اللَّبِنَةُ، وَأَنَا خَاتِمُ النَّبِيِّينَ ‏"‏‏.‏
Reference : Sahih al-Bukhari 3535
In-book reference : Book 61, Hadith 44
USC-MSA web (English) reference : Vol. 4, Book 56, Hadith 735
  (deprecated numbering scheme)