Al-Ma'idah 5:85

Faathabahumu Allahu bimaqaloo jannatin tajree min tahtihaal-anharu khalideena feeha wathalikajazao almuhsineen

So Allāh rewarded them for what they said with gardens [in Paradise] beneath which rivers flow, wherein they abide eternally. And that is the reward of doers of good.

So, because of what they said, Allah has awarded them gardens beneath which rivers flow, wherein they will live forever. That is the reward of those who are good in their deeds.