The Repentance - 9:100
Allah is pleased with the pioneers of the emigrants (Muhajireen) and the helpers (Ansar) and those who followed them well, and they are pleased with Him. He has prepared for them Gardens in which rivers flow and where they will abide forever. This is the great victory.
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?