Surah al-Ikhlaas
Salam aleikum
Abu Hurayrah reported that the Prophet (peace and blessings of Allaah be upon him) heard a man reciting Qul huwa Allaahu ahad, and said, “It is his right.’ They asked, ‘O Messenger of Allaah, what is his right?’ He said, ‘Paradise is his right.’ (Reported by Imaam Ahmad, 7669)
The Prophet (peace and blessings of Allaah be upon him) said: “Whoever recites Qul huwa Allaahu ahad ten times, Allaah will build for him a house in Paradise.” (Saheeh al-Jaami’ al-Sagheer, 6472).