Qais bin Abi Hazim (may Allah have mercy on him) says that once we visited him and he was building his wall. He said: Indeed, whatever a Muslim spends, he is surely rewarded for it, except for what he spends on mud (i.e., construction).
Hadith Referenceالادب المفرد / كتاب السرف فى البناء / 455
Hadith Gradingالألبانی:صحيح
Hadith Takhrij«صحيح : أخرجه البخاري ، انظر الحديث السابق»
Explanation & Benefits
Shaykh Maulana Usman Muneeb
Benefits and Issues: Expenditure made on the construction of mosques and other necessary buildings, insha’Allah, is not devoid of benefit. For details, see the benefits of Hadith: 447.
Source: Fadlullah al-Ahad: Urdu Commentary on al-Adab al-Mufrad, Page: 455