Purchasing a Well in Jannah

When the Sahaabah (radhiyallahu ‘anhum) migrated to Madeenah Munawwarah, the water that was found in Madeenah Munawwarah was difficult for them to drink due it being bitter. However, there was a Jew who had a well of sweet water named Roomah, and he used to sell the water of this well to the Sahaabah (radhiyallahu ‘anhum).