Anas bin Malik narrated that the Messenger of Allah (peace be upon him) said:
“Whoever asks Allah (s.w.t) Paradise three times, Paradise says: ‘O Allah, admit him into Paradise’, and whoever seeks refuge from the Fire three times, the Fire says: ‘O Allah, save him from the Fire.'”
Jami` at-Tirmidhi, Vol.4, Book 38, Hadith 2772
