The Family Of Imran - 3:198
For those who listen to their Lord there are Gardens in which rivers flow. They will abide therein forever as a dwelling from Allah. Better for the righteous is that which is with Allah.
The rivers in Paradise:
Muhammad/47:15
This is the example of Paradise promised to the righteous: In it are rivers of pure water, rivers of milk whose taste does not spoil, rivers of intoxicants that give flavor to those who drink them, and rivers of strained honey. For them therein are all kinds of produce and forgiveness from their Lord. Will their condition be like that of those who are made to drink of boiling water which stays in the fire permanently and tears their bowels?