Mujahid bin Jabir مجاهد بن جبر · The Book on Salat (Prayer)

"The Prophet said: 'Whoever calls the Adhan for seven years, seeking reward for it, salvation from the Fire is written for him.'"

"We were with the Prophet (S) on a journey when it started to rain on us, so the Prophet (S) said: 'Whoever wishes, let him perform Salat in his place.'"

Allah's Messenger (S) said: "The two Rak'ah of Fajr are better than the world and what is in it."