The similitude of mine and that of the Apostles is like that of a person who built a house and he completed it and made it perfect but for the space of a brick. People entered therein and they were surprised at it and said: Had there been a brick (it would have been complete in all respects). Messenger of Allah ﷺ said: I am that place where the brick (completing the building is to be placed), and I have come to finalise the chain of Apostles. (Using translation from Muslim 2287a)
عَنِ النَّبِيِّ ﷺ قَالَ مَثَلِي وَمَثَلُ الْأَنْبِيَاءِ كَمَثَلِ رَجُلٍ ابْتَنَى دَارًا فَأَكْمَلَهَا وَأَحْسَنَهَا إِلَّا مَوْضِعَ لَبِنَةٍ فَجَعَلَ النَّاسُ يَدْخُلُونَهَا وَيَعْجَبُونَ وَيَقُولُونَ لَوْلَا مَوْضِعُ اللَّبِنَةِ قَالَ رَسُولُ اللهِ ﷺ فَأَنَا مَوْضِعُ اللَّبِنَةِ جِئْتُ فَخَتَمْتُ الْأَنْبِيَاءَ