Silsilat al-Ahadith al-Sahihah

It is narrated from Sayyiduna Mu'adh bin Anas al-Juhani, may Allah be pleased with him, that the Noble Prophet, peace and blessings be upon him, said: "Whoever recites «قُلْ هُوَ اللَّهُ أَحَدٌ», that is, Surah al-Ikhlas, ten times to the end, Allah Almighty will build a palace for him in Paradise." Sayyiduna Umar, may Allah be pleased with him, said: O Messenger of Allah! Then we can acquire many palaces. The Prophet, peace and blessings be upon him, said: "Allah Almighty is even more abundant and excellent in giving."