When the Prophet ﷺ ordered that the mosque be built, he said, "O Bani An-Najjar! Suggest to me a price for this garden of yours." They replied, "By Allah! We will demand its price from none but Allah."  

أَمَرَ النَّبِيُّ ﷺ بِبِنَاءِ الْمَسْجِدِ فَقَالَ يَا بَنِي النَّجَّارِ ثَامِنُونِي بِحَائِطِكُمْ هَذَا قَالُوا لاَ وَاللَّهِ لاَ نَطْلُبُ ثَمَنَهُ إِلاَّ إِلَى اللَّهِ