It is narrated from the Mother of the Believers, Sayyidah Aishah (may Allah be pleased with her), that she said: The Messenger of Allah (peace and blessings be upon him) said: "Whoever builds a mosque for the sake of Allah, Allah Almighty will build a house for him in Paradise."
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Ata (may Allah have mercy on him) except Kathir bin Abd al-Rahman (may Allah have mercy on him)."
Hadith Referenceالمعجم الأوسط / باب الميم / 6586
Hadith Takhrij«أخرجه ابن حجر فى «المطالب العالية» برقم: 353 / 1، 353 / 2، وابن أبي شيبة فى «مصنفه» برقم: 3178، والطحاوي فى «شرح مشكل الآثار» برقم: 1556، والطبراني فى «الأوسط» برقم: 7005»