Abu Sa'id and Abu Huraira reported Allah's Messenger ﷺ as saying that if anyone says “There is no Allah but Allah and Allah is most great”, his Lord will declare that he has spoken the truth, saying, “There is no Allah but me, and I am most great.” When he says, “There is no Allah but Allah alone who has no partner,” Allah says, “There is no Allah but me alone who has no partner.” When he says, “There is no Allah but Allah to whom belongs the dominion and to whom praise is due,” He says, “There is no Allah but me to whom belongs the dominion and to whom praise is due.” When he says, “There is no Allah but Allah, and there is no might and no power except in Allah,” He says, “There is no Allah but me, and there is no might and no power except in me.” He used to say that if anyone said these words in his last illness, hell would not devour him. Tirmidhi and Ibn Majah transmitted it.