Sunan Ibn Majah: Book 33, Hadith 138

It was narrated from Abu Hurairah and Abu Saeed bore witness that the Messenger of Allah(ﷺ) said: “If a person says: ‘La ilaha illallahu wa Allahu Akbar (None has the right to be worshipped but Allah and Allah is the Most Great),’Allah says: ‘My slave has spoken the truth; there is none worthy of worship except I, and I am the Most Great.’ If a person says: La ilaha Illallah wahdahu (There is none worthy of worship except Allah alone), Allah says: ‘My slave has spoken the truth; there is none worthy of worship except I, alone.’ If he says, La ilaha illallahu la sharikalahu (There is none worthy of worship except Allah with no partner or associate),’ Allah says: ‘My slave has spoken the truth; there is none worthy of worship except I, with no partner or associate.’ If he says: ‘La illah illallah, lahul mulku wa lahul hamdu (There is none worthy of worship except Allah, all dominion is His and all praise is to Him),’ Allah says: ‘My slave has spoken the truth; there is none of worthy of worship except I, all dominion Mine and all praise is due to Me.’ If he says: ‘ La illaha illallah, la hawla wa la quwwata illa billah (There is none worthy of worship and there is no power and no strength except with Allah),’ Allah says: ‘My slave has spoken then truth; there is none worthy of worship except I, and tehre is no power and no strength except with Me.’ One of the narrators Abu Ishaq said: “Then Agharr (another narrator) said something that I did not understand. I said to Abu Jafar: ‘What did he say?’ He said: ‘Whoever is blessed with (the ability to say) them (these words) at the time of death, the Fire will not touch him.'”