"And give good tidings to those who believe and do righteous deeds that they will have gardens beneath which rivers flow." (Verse 25)
Muhammad said: This means: gardens beneath which rivers flow; that is, beneath their trees, not beneath their soil.
Yahya said: It reached me from Aban ibn Abi Ayyash, from Anas ibn Malik, that he said: "It is the Garden where water, milk, honey, and wine flow (without a trench), and it is easier for it; the mud of its river is fragrant musk, its pebbles are pearls and jacinth, and its banks are domes of pearl."