فضائل الذكر
Ibn Mas‘ūd (may Allah be pleased with him) reported that the Prophet (may Allah's peace and blessings be upon him) said: "I met Ibrahīm on the Night of Ascension and he said to me: 'O Muhammad, convey my greetings to your nation, and tell them that Paradise has pure soil and sweet water. It is a vast plain land and its seedlings are: glory be to Allah, praise be to Allah, there is no god but Allah, and Allah is Greatest.'"
عن ابن مسعود -رضي الله عنه- مرفوعاً: «لَقِيْتُ إبراهيم ليلة أُسْرِيَ بي، فقال: يا محمد أقْرِىء أُمَّتَكَ مِنِّي السَّلام، وأَخْبِرْهُم أن الجنَّة طَيّبَةُ التُّربَة، عَذْبَةُ الماء، وأنها قِيعَانٌ وأن غِراسَها: سُبْحَان الله، والحمد لله، ولا إله إلا الله، والله أكبر».
شرح الحديث :
In this Hadīth, the Prophet (may Allah's peace and blessings be upon him) informs us that he met Prophet Ibrahīm (peace be upon him) on the night he ascended to the Heavens (Isrā’ and Mi‘rāj). Prophet Ibrahīm told him to convey his greetings to the Muslim nation and to tell them that Paradise has a fine pure soil - as its soil is of saffron as mentioned in a narration in Sunan At-Tirmidhi when the Companions (may Allah be pleased with them) asked the Prophet (may Allah's peace and blessings be upon him) about Paradise and he said: "... and its soil is saffron". In another narration in Musnad Ahmad, he said: "... and its soil is ‘wars’ (a type of perfume) and saffron." "... and its water is sweet", i.e. it has a sweet taste, just as Allah, the Almighty, describes it in the verse: {The description of Paradise, which the righteous are promised, wherein are rivers of water unaltered} [Sūrat Muhammad: 15], meaning it is not changed with saltiness or anything else. So, if Paradise has pure soil and sweet water, then indeed the seedlings that grow in it are even purer and sweeter. Its land is in the form of vast leveled plains, and the seedlings that grow in these plains are the good statements of Dhikr. Those statements are: glory be to Allah, praise be to Allah, there is no god but Allah, and Allah is Greatest. The meaning is that whoever praises Allah, glorifies Him, and exalts Him, with these good statements, then a date palm tree will be planted for him in Paradise.