Sahih Muslim Book 4, Hadith Number 1381.

Chapter : Forbiddance to go out of the mosque after the Adhan has been announced by the Mu’adhdhin.

Jundab b. ‘Abdullah reported Allah’s Messenger (may peace be upon him) as saying: He who prayed the morning prayer (in congregation) he is in fact under the protection of Allah. And it can never happen that Allah should demand anything from you in connection with the protection (that He guarantees) and one should not get it. He would then throw him in the fire of Hell.