Musannaf Ibn Abi Shaybah

Hazrat Saeed bin Jubair (may Allah have mercy on him) states that even the lowest rank of a person in Paradise will be such that he will have a thousand palaces, in which there will be seventy thousand servants. Each servant will have a tray in his hand, different from the trays with his companions. Its door will not be opened with anything except what he desires. If he wishes to host all the people of the world, there will be enough spaciousness for them.