"All expenditures are in Allah's Cause, except for buildings, for there is no good in it."  

قَالَ رَسُولُ اللَّهِ ﷺ النَّفَقَةُ كُلُّهَا فِي سَبِيلِ اللَّهِ إِلاَّ الْبِنَاءَ فَلاَ خَيْرَ فِيهِ  

"We went to visit Khabbab who had himself cauterized in seven places on his body. He said: 'I have been ill for so long, and if it was not that I heard the Messenger of Allah ﷺ saying: "None of you should wish for death" then I would have wished for it, and he said: "A man is rewarded for [all of] his spending except for the dust" - or he said - "in the building."  

أَتَيْنَا خَبَّابًا نَعُودُهُ وَقَدِ اكْتَوَى سَبْعَ كَيَّاتٍ فَقَالَ لَقَدْ تَطَاوَلَ مَرَضِي وَلَوْلاَ أَنِّي سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ لاَ تَمَنَّوُا الْمَوْتَ لَتَمَنَّيْتُ وَقَالَ يُؤْجَرُ الرَّجُلُ فِي نَفَقَتِهِ كُلِّهَا إِلاَّ التُّرَابَ أَوْ قَالَ فِي الْبِنَاءِ