Sunan at-Tirmidhi (Jami-al-Tirmidhi), Chapter: Salah (Prayers)

It is also reported that he said, "If anyone builds for Allah, a mosque small or large then Allah makes a house for him in Paradise." This hadith is reported from Qutayba ibn Saeed from Nuh ibn Qays, from Abdur Rahman the freed man of Qays who reported from Ziyad Numayri who from Sayyidina Anas, who on the authority of the Prophet (SAW). Mahmud ibn Lubayd had met the Prophet while Mahmud ibn Rabi had seen the Prophet (SAW) they were two young children of Madinah.