[14].Surah Ibrahim {A.S} [Abraham (PBUH)]: Ayat 24-25

Ayat 24. See you not how Allah sets forth a parable? - A goodly word as a goodly tree, whose root is firmly fixed, and its branches (reach) to the sky (i.e. very high).

Ayat 25. Giving its fruit at all times, by the Leave of its Lord and Allah sets forth parables for mankind in order that they may remember.

Hazrat Abu Said Al-Khudri and Abu Hurairah (May Allah be pleased with them) reported: The Messenger of Allah  [SAWW](PBUH) said, "If a person says: `La ilaha illallahu wallahu Akbar (There is no true god except Allah and Allah is Greatest)', his Rubb responds to him and affirms: `(Yes!) There is no true god except I, and I am the Greatest.' When he says: `La ilaha illallahu Wahdahu la sharika Lahu (There is no true god except Allah, the One, He has no partner).' Allah (SWT) affirms: `(Yes!) There is no true god except I. I have no partner.' When he says: `La ilaha illallahu Lahul mulku wa Lahul-hamdu (the sovereignty belongs to Him and all the praise is due to Him).' He (SWT) affirms: `(Yes!) There is no true god except I, Mine is the praise and to Me belongs the sovereignty.' When he says: `La ilaha illallahu wa la hawla wa la quwwata illa Billah (There is no true god except Allah, and there is no might and power but with Allah).' He (SWT) affirms: `(Yes!) There is no true god except I, and there is no might and power but with Me.''' The Messenger of Allah  [SAWW](PBUH) added, "He who recites this during his illness and dies, will not be touched by the Fire (Hell).'' [At-Tirmidhi Hadith # 809]. 

Lesson : as mentioned above in Surah Ibrahim {A.S} Ayat 24. "See you not how Allah sets forth a parable? - A goodly word" This Hadith points out the excellence of the words mentioned above. This is so because of great meaning they have, namely the firm belief in Allah, His Oneness and Glorification; that to Him Alone we should return, upon Him Alone we should rely, and to Him Alone we should express gratefulness. If somebody utters them during his illness, his life is sure to come to an end in a good way, that is, he will go to Jannah.