The Prophet said: “I met Ibraheem on the night I was taken on my night journey (night of Isra’ ). So he said: O’ Muhammad! Convey to your nation As-Salam from me, and inform them that Paradise is of good soil, palatable water, and that it is a flat place and its enplantment [is]: Subhana ‘allahi, ‘al-hamdu lil-lahi, la ‘ilaha ‘illa ‘allahu, and ‘allahu ‘akbaru (18).”
(18) Same as footnote #10.
Reported by At-Tirmithi and he said it was comely. Al-Albani said the same, and included it in The Authentic of Good Sayings as #14.