Imam Ahmad recorded that Abu Sa`id Al-Khudri, may Allah be pleased with him, said that the Messenger of Allah said:

«مَثَلِي وَمَثَلُ النَّــبِيينَ كَمَثَلِ رَجُلٍ بَنَى دَارًا فَأَتَمَّهَا إِلَّا لَبِنَةً وَاحِدَةً، فَجِئْتُ أَنَا فَأَتْمَمْتُ تِلْكَ اللَّبِنَة»

(The parable of myself and the Prophets is that of a man who built a house and completed it apart from the space of one brick. I have come and completed that brick.) This was also recorded by Muslim.